102556025591 has 2 divisors, whose sum is σ = 102556025592. Its totient is φ = 102556025590.

The previous prime is 102556025569. The next prime is 102556025597. The reversal of 102556025591 is 195520655201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102556025591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102556025597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51278012795 + 51278012796.

It is an arithmetic number, because the mean of its divisors is an integer number (51278012796).

Almost surely, 2^102556025591 is an apocalyptic number.

102556025591 is a deficient number, since it is larger than the sum of its proper divisors (1).

102556025591 is an equidigital number, since it uses as much as digits as its factorization.

102556025591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 102556025591 in words is "one hundred two billion, five hundred fifty-six million, twenty-five thousand, five hundred ninety-one".