15551764136 has 16 divisors (see below), whose sum is σ = 29709738900. Its totient is φ = 7629167104.

The previous prime is 15551764099. The next prime is 15551764183. The reversal of 15551764136 is 63146715551.

It can be written as a sum of positive squares in 2 ways, for example, as 14368816900 + 1182947236 = 119870^2 + 34394^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18338921 + ... + 18339768.

Almost surely, 2^15551764136 is an apocalyptic number.

It is an amenable number.

15551764136 is a deficient number, since it is larger than the sum of its proper divisors (14157974764).

15551764136 is a wasteful number, since it uses less digits than its factorization.

15551764136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36678748 (or 36678744 counting only the distinct ones).

The product of its digits is 378000, while the sum is 44.

The spelling of 15551764136 in words is "fifteen billion, five hundred fifty-one million, seven hundred sixty-four thousand, one hundred thirty-six".