53961431599 has 2 divisors, whose sum is σ = 53961431600. Its totient is φ = 53961431598.

The previous prime is 53961431549. The next prime is 53961431651. The reversal of 53961431599 is 99513416935.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53961431599 - 2⁷ = 53961431471 is a prime.

It is a super-2 number, since 2×53961431599² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53961431539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26980715799 + 26980715800.

It is an arithmetic number, because the mean of its divisors is an integer number (26980715800).

Almost surely, 2^53961431599 is an apocalyptic number.

53961431599 is a deficient number, since it is larger than the sum of its proper divisors (1).

53961431599 is an equidigital number, since it uses as much as digits as its factorization.

53961431599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3936600, while the sum is 55.

The spelling of 53961431599 in words is "fifty-three billion, nine hundred sixty-one million, four hundred thirty-one thousand, five hundred ninety-nine".