15071864664 has 32 divisors (see below), whose sum is σ = 38210365440. Its totient is φ = 4953194400.

The previous prime is 15071864657. The next prime is 15071864669. The reversal of 15071864664 is 46646817051.

It is a happy number.

It is a super-2 number, since 2×15071864664² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15071864669) 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, 4420792 + ... + 4424199.

It is an arithmetic number, because the mean of its divisors is an integer number (1194073920).

Almost surely, 2^15071864664 is an apocalyptic number.

It is an amenable number.

15071864664 is an abundant number, since it is smaller than the sum of its proper divisors (23138500776).

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

15071864664 is a wasteful number, since it uses less digits than its factorization.

15071864664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8845071 (or 8845067 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 15071864664 in words is "fifteen billion, seventy-one million, eight hundred sixty-four thousand, six hundred sixty-four".