64155533602512 has 40 divisors (see below), whose sum is σ = 180801958335840. Its totient is φ = 19441070788480.

The previous prime is 64155533602451. The next prime is 64155533602529. The reversal of 64155533602512 is 21520633555146.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60753345687 + ... + 60753346742.

It is an arithmetic number, because the mean of its divisors is an integer number (4520048958396).

Almost surely, 2^{64155533602512} is an apocalyptic number.

It is an amenable number.

64155533602512 is an abundant number, since it is smaller than the sum of its proper divisors (116646424733328).

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

64155533602512 is a wasteful number, since it uses less digits than its factorization.

64155533602512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121506692451 (or 121506692445 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 64155533602512 in words is "sixty-four trillion, one hundred fifty-five billion, five hundred thirty-three million, six hundred two thousand, five hundred twelve".