64135140 has 48 divisors (see below), whose sum is σ = 180075840. Its totient is φ = 17055360.

The previous prime is 64135117. The next prime is 64135151. The reversal of 64135140 is 4153146.

It is a super-2 number, since 2×64135140² = 8226632365639200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64135140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23991 + ... + 26529.

It is an arithmetic number, because the mean of its divisors is an integer number (3751580).

Almost surely, 2^64135140 is an apocalyptic number.

64135140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64135140 is an abundant number, since it is smaller than the sum of its proper divisors (115940700).

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

64135140 is a wasteful number, since it uses less digits than its factorization.

64135140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 64135140 is about 8008.4417960050. The cubic root of 64135140 is about 400.2813437345.

Adding to 64135140 its reverse (4153146), we get a palindrome (68288286).

The spelling of 64135140 in words is "sixty-four million, one hundred thirty-five thousand, one hundred forty".