53396506821 has 32 divisors (see below), whose sum is σ = 85270662400. Its totient is φ = 29687611968.

The previous prime is 53396506811. The next prime is 53396506859. The reversal of 53396506821 is 12860569335.

It is not a de Polignac number, because 53396506821 - 2⁷ = 53396506693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53396506811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 663166 + ... + 739311.

It is an arithmetic number, because the mean of its divisors is an integer number (2664708200).

Almost surely, 2^53396506821 is an apocalyptic number.

It is an amenable number.

53396506821 is a deficient number, since it is larger than the sum of its proper divisors (31874155579).

53396506821 is a wasteful number, since it uses less digits than its factorization.

53396506821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402538 (or 1402524 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 53396506821 in words is "fifty-three billion, three hundred ninety-six million, five hundred six thousand, eight hundred twenty-one".