15440164064 has 48 divisors (see below), whose sum is σ = 33291019440. Its totient is φ = 7005434880.

The previous prime is 15440164057. The next prime is 15440164067. The reversal of 15440164064 is 46046104451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15440164067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289997 + ... + 339084.

It is an arithmetic number, because the mean of its divisors is an integer number (693562905).

Almost surely, 2^15440164064 is an apocalyptic number.

It is an amenable number.

15440164064 is an abundant number, since it is smaller than the sum of its proper divisors (17850855376).

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

15440164064 is a wasteful number, since it uses less digits than its factorization.

15440164064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629163 (or 629155 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 15440164064 in words is "fifteen billion, four hundred forty million, one hundred sixty-four thousand, sixty-four".