56736728069615 has 16 divisors (see below), whose sum is σ = 74276621494560. Its totient is φ = 41261360200320.

The previous prime is 56736728069573. The next prime is 56736728069639. The reversal of 56736728069615 is 51696082763765.

It is not a de Polignac number, because 56736728069615 - 2⁶ = 56736728069551 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20098220 + ... + 22746689.

It is an arithmetic number, because the mean of its divisors is an integer number (4642288843410).

Almost surely, 2^{56736728069615} is an apocalyptic number.

56736728069615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56736728069615 is a deficient number, since it is larger than the sum of its proper divisors (17539893424945).

56736728069615 is a wasteful number, since it uses less digits than its factorization.

56736728069615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42869002.

The product of its (nonzero) digits is 685843200, while the sum is 71.

The spelling of 56736728069615 in words is "fifty-six trillion, seven hundred thirty-six billion, seven hundred twenty-eight million, sixty-nine thousand, six hundred fifteen".