53256635557 has 4 divisors (see below), whose sum is σ = 53639776960. Its totient is φ = 52873494156.

The previous prime is 53256635461. The next prime is 53256635563. The reversal of 53256635557 is 75553665235.

53256635557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53256635557 - 2²³ = 53248246949 is a prime.

It is a super-2 number, since 2×53256635557² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53256635057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191570493 + ... + 191570770.

It is an arithmetic number, because the mean of its divisors is an integer number (13409944240).

Almost surely, 2^53256635557 is an apocalyptic number.

It is an amenable number.

53256635557 is a deficient number, since it is larger than the sum of its proper divisors (383141403).

53256635557 is a wasteful number, since it uses less digits than its factorization.

53256635557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383141402.

The product of its digits is 14175000, while the sum is 52.

The spelling of 53256635557 in words is "fifty-three billion, two hundred fifty-six million, six hundred thirty-five thousand, five hundred fifty-seven".