15500258487772 has 12 divisors (see below), whose sum is σ = 27125510285160. Its totient is φ = 7750112692016.

The previous prime is 15500258487743. The next prime is 15500258487851. The reversal of 15500258487772 is 27778485200551.

It is a self number, because there is not a number n which added to its sum of digits gives 15500258487772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1895947 + ... + 5881762.

It is an arithmetic number, because the mean of its divisors is an integer number (2260459190430).

Almost surely, 2^{15500258487772} is an apocalyptic number.

It is an amenable number.

15500258487772 is a deficient number, since it is larger than the sum of its proper divisors (11625251797388).

15500258487772 is a wasteful number, since it uses less digits than its factorization.

15500258487772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275940 (or 8275938 counting only the distinct ones).

The product of its (nonzero) digits is 43904000, while the sum is 61.

The spelling of 15500258487772 in words is "fifteen trillion, five hundred billion, two hundred fifty-eight million, four hundred eighty-seven thousand, seven hundred seventy-two".