53639408993 has 2 divisors, whose sum is σ = 53639408994. Its totient is φ = 53639408992.

The previous prime is 53639408923. The next prime is 53639409041. The reversal of 53639408993 is 39980493635.

53639408993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53607067024 + 32341969 = 231532^2 + 5687^2 .

It is a cyclic number.

It is not a de Polignac number, because 53639408993 - 2⁸ = 53639408737 is a prime.

It is not a weakly prime, because it can be changed into another prime (53639408923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26819704496 + 26819704497.

It is an arithmetic number, because the mean of its divisors is an integer number (26819704497).

Almost surely, 2^53639408993 is an apocalyptic number.

It is an amenable number.

53639408993 is a deficient number, since it is larger than the sum of its proper divisors (1).

53639408993 is an equidigital number, since it uses as much as digits as its factorization.

53639408993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18895680, while the sum is 59.

The spelling of 53639408993 in words is "fifty-three billion, six hundred thirty-nine million, four hundred eight thousand, nine hundred ninety-three".