64415512 has 64 divisors (see below), whose sum is σ = 142401600. Its totient is φ = 26749440.

The previous prime is 64415509. The next prime is 64415623. The reversal of 64415512 is 21551446.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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, 372258 + ... + 372430.

It is an arithmetic number, because the mean of its divisors is an integer number (2225025).

Almost surely, 2^64415512 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 64415512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71200800).

64415512 is an abundant number, since it is smaller than the sum of its proper divisors (77986088).

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

64415512 is a wasteful number, since it uses less digits than its factorization.

64415512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 352 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 64415512 is about 8025.9274853440. The cubic root of 64415512 is about 400.8637833531.

Adding to 64415512 its reverse (21551446), we get a palindrome (85966958).

The spelling of 64415512 in words is "sixty-four million, four hundred fifteen thousand, five hundred twelve".