64135512 has 144 divisors (see below), whose sum is σ = 206472240. Its totient is φ = 17978688.

The previous prime is 64135493. The next prime is 64135531. The reversal of 64135512 is 21553146.

64135512 is a `hidden beast` number, since 641 + 3 + 5 + 5 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (64135493) and next prime (64135531).

It is a super-2 number, since 2×64135512² = 8226727799004288, which contains 22 as substring.

Its product of digits (3600) is a multiple of the sum of its prime factors (100).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1210078 + ... + 1210130.

It is an arithmetic number, because the mean of its divisors is an integer number (1433835).

Almost surely, 2^64135512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64135512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103236120).

64135512 is an abundant number, since it is smaller than the sum of its proper divisors (142336728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64135512 is an equidigital number, since it uses as much as digits as its factorization.

64135512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 65 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 64135512 is about 8008.4650214632. The cubic root of 64135512 is about 400.2821176440.

Adding to 64135512 its reverse (21553146), we get a palindrome (85688658).

It can be divided in two parts, 64 and 135512, that multiplied together give a palindrome (8672768).

The spelling of 64135512 in words is "sixty-four million, one hundred thirty-five thousand, five hundred twelve".