64280155776 has 32 divisors (see below), whose sum is σ = 170744164800. Its totient is φ = 21426718464.

The previous prime is 64280155769. The next prime is 64280155781. The reversal of 64280155776 is 67755108246.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83697736 + ... + 83698503.

It is an arithmetic number, because the mean of its divisors is an integer number (5335755150).

Almost surely, 2^64280155776 is an apocalyptic number.

It is an amenable number.

64280155776 is an abundant number, since it is smaller than the sum of its proper divisors (106464009024).

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

64280155776 is a wasteful number, since it uses less digits than its factorization.

64280155776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167396256 (or 167396244 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 64280155776 in words is "sixty-four billion, two hundred eighty million, one hundred fifty-five thousand, seven hundred seventy-six".