64155116928 has 128 divisors (see below), whose sum is σ = 197103755520. Its totient is φ = 18109126656.

The previous prime is 64155116903. The next prime is 64155116941. The reversal of 64155116928 is 82961155146.

It is a tau number, because it is divible by the number of its divisors (128).

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 15 ways as a sum of consecutive naturals, for example, 79326 + ... + 366882.

It is an arithmetic number, because the mean of its divisors is an integer number (1539873090).

Almost surely, 2^64155116928 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 64155116928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98551877760).

64155116928 is an abundant number, since it is smaller than the sum of its proper divisors (132948638592).

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

64155116928 is a wasteful number, since it uses less digits than its factorization.

64155116928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287664 (or 287652 counting only the distinct ones).

The product of its digits is 518400, while the sum is 48.

The spelling of 64155116928 in words is "sixty-four billion, one hundred fifty-five million, one hundred sixteen thousand, nine hundred twenty-eight".