53210639957 has 4 divisors (see below), whose sum is σ = 53211530220. Its totient is φ = 53209749696.

The previous prime is 53210639929. The next prime is 53210640013. The reversal of 53210639957 is 75993601235.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21807610276 + 31403029681 = 147674^2 + 177209^2 .

It is a cyclic number.

It is not a de Polignac number, because 53210639957 - 2¹⁰ = 53210638933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53210639257) 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, 348482 + ... + 477347.

It is an arithmetic number, because the mean of its divisors is an integer number (13302882555).

Almost surely, 2^53210639957 is an apocalyptic number.

It is an amenable number.

53210639957 is a deficient number, since it is larger than the sum of its proper divisors (890263).

53210639957 is an equidigital number, since it uses as much as digits as its factorization.

53210639957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890262.

The product of its (nonzero) digits is 1530900, while the sum is 50.

The spelling of 53210639957 in words is "fifty-three billion, two hundred ten million, six hundred thirty-nine thousand, nine hundred fifty-seven".