15990464677 has 16 divisors (see below), whose sum is σ = 17961840000. Its totient is φ = 14107400640.

The previous prime is 15990464663. The next prime is 15990464687. The reversal of 15990464677 is 77646409951.

It is a cyclic number.

It is not a de Polignac number, because 15990464677 - 2¹⁵ = 15990431909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15990464627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107824 + ... + 208822.

It is an arithmetic number, because the mean of its divisors is an integer number (1122615000).

Almost surely, 2^15990464677 is an apocalyptic number.

It is an amenable number.

15990464677 is a deficient number, since it is larger than the sum of its proper divisors (1971375323).

15990464677 is a wasteful number, since it uses less digits than its factorization.

15990464677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101436.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 15990464677 in words is "fifteen billion, nine hundred ninety million, four hundred sixty-four thousand, six hundred seventy-seven".