53044251991 has 2 divisors, whose sum is σ = 53044251992. Its totient is φ = 53044251990.

The previous prime is 53044251971. The next prime is 53044252007. The reversal of 53044251991 is 19915244035.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53044251991 - 2²¹ = 53042154839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53044251941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26522125995 + 26522125996.

It is an arithmetic number, because the mean of its divisors is an integer number (26522125996).

Almost surely, 2^53044251991 is an apocalyptic number.

53044251991 is a deficient number, since it is larger than the sum of its proper divisors (1).

53044251991 is an equidigital number, since it uses as much as digits as its factorization.

53044251991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 53044251991 in words is "fifty-three billion, forty-four million, two hundred fifty-one thousand, nine hundred ninety-one".