53021564615 has 4 divisors (see below), whose sum is σ = 63625877544. Its totient is φ = 42417251688.

The previous prime is 53021564569. The next prime is 53021564677. The reversal of 53021564615 is 51646512035.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53021564615 - 2¹⁸ = 53021302471 is a prime.

It is a super-2 number, since 2×53021564615² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 5302156457 + ... + 5302156466.

It is an arithmetic number, because the mean of its divisors is an integer number (15906469386).

Almost surely, 2^53021564615 is an apocalyptic number.

53021564615 is a deficient number, since it is larger than the sum of its proper divisors (10604312929).

53021564615 is a wasteful number, since it uses less digits than its factorization.

53021564615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10604312928.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 53021564615 in words is "fifty-three billion, twenty-one million, five hundred sixty-four thousand, six hundred fifteen".