15123808772 has 6 divisors (see below), whose sum is σ = 26466665358. Its totient is φ = 7561904384.

The previous prime is 15123808717. The next prime is 15123808783. The reversal of 15123808772 is 27780832151.

It can be written as a sum of positive squares in only one way, i.e., 10045251076 + 5078557696 = 100226^2 + 71264^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890476093 + ... + 1890476100.

It is an arithmetic number, because the mean of its divisors is an integer number (4411110893).

Almost surely, 2^15123808772 is an apocalyptic number.

It is an amenable number.

15123808772 is a deficient number, since it is larger than the sum of its proper divisors (11342856586).

15123808772 is a wasteful number, since it uses less digits than its factorization.

15123808772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780952197 (or 3780952195 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 15123808772 in words is "fifteen billion, one hundred twenty-three million, eight hundred eight thousand, seven hundred seventy-two".