64520608012472 has 128 divisors (see below), whose sum is σ = 125539430016000. Its totient is φ = 31067603094528.

The previous prime is 64520608012457. The next prime is 64520608012499. The reversal of 64520608012472 is 27421080602546.

It is a super-2 number, since 2×64520608012472² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8989909748 + ... + 8989916924.

It is an arithmetic number, because the mean of its divisors is an integer number (980776797000).

Almost surely, 2^{64520608012472} is an apocalyptic number.

It is an amenable number.

64520608012472 is a deficient number, since it is larger than the sum of its proper divisors (61018822003528).

64520608012472 is a wasteful number, since it uses less digits than its factorization.

64520608012472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8405 (or 8401 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 64520608012472 in words is "sixty-four trillion, five hundred twenty billion, six hundred eight million, twelve thousand, four hundred seventy-two".