53115215615 has 32 divisors (see below), whose sum is σ = 80237454336. Its totient is φ = 32789295360.

The previous prime is 53115215563. The next prime is 53115215627. The reversal of 53115215615 is 51651251135.

It is not a de Polignac number, because 53115215615 - 2⁸ = 53115215359 is a prime.

It is a super-2 number, since 2×53115215615² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 630062 + ... + 709371.

It is an arithmetic number, because the mean of its divisors is an integer number (2507420448).

Almost surely, 2^53115215615 is an apocalyptic number.

53115215615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

53115215615 is a deficient number, since it is larger than the sum of its proper divisors (27122238721).

53115215615 is a wasteful number, since it uses less digits than its factorization.

53115215615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339559.

The product of its digits is 22500, while the sum is 35.

The spelling of 53115215615 in words is "fifty-three billion, one hundred fifteen million, two hundred fifteen thousand, six hundred fifteen".