56735781515 has 16 divisors (see below), whose sum is σ = 78104936448. Its totient is φ = 38756603616.

The previous prime is 56735781481. The next prime is 56735781517. The reversal of 56735781515 is 51518753765.

It is a cyclic number.

It is not a de Polignac number, because 56735781515 - 2¹² = 56735777419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56735781517) 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, 3072587 + ... + 3090996.

It is an arithmetic number, because the mean of its divisors is an integer number (4881558528).

Almost surely, 2^56735781515 is an apocalyptic number.

56735781515 is a deficient number, since it is larger than the sum of its proper divisors (21369154933).

56735781515 is a wasteful number, since it uses less digits than its factorization.

56735781515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6163858.

The product of its digits is 4410000, while the sum is 53.

The spelling of 56735781515 in words is "fifty-six billion, seven hundred thirty-five million, seven hundred eighty-one thousand, five hundred fifteen".