53401621365 has 24 divisors (see below), whose sum is σ = 98007682968. Its totient is φ = 26805519360.

The previous prime is 53401621309. The next prime is 53401621373. The reversal of 53401621365 is 56312610435.

53401621365 is a `hidden beast` number, since 534 + 0 + 1 + 62 + 1 + 3 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 30759196689 + 22642424676 = 175383^2 + 150474^2 .

It is not a de Polignac number, because 53401621365 - 2³⁴ = 36221752181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34902256 + ... + 34903785.

It is an arithmetic number, because the mean of its divisors is an integer number (4083653457).

Almost surely, 2^53401621365 is an apocalyptic number.

It is an amenable number.

53401621365 is a deficient number, since it is larger than the sum of its proper divisors (44606061603).

53401621365 is a wasteful number, since it uses less digits than its factorization.

53401621365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69806069 (or 69806066 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 53401621365 in words is "fifty-three billion, four hundred one million, six hundred twenty-one thousand, three hundred sixty-five".