102625844557 has 2 divisors, whose sum is σ = 102625844558. Its totient is φ = 102625844556.

The previous prime is 102625844549. The next prime is 102625844561. The reversal of 102625844557 is 755448526201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78994161481 + 23631683076 = 281059^2 + 153726^2 .

It is an emirp because it is prime and its reverse (755448526201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102625844557 - 2³ = 102625844549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102625844557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102625844507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51312922278 + 51312922279.

It is an arithmetic number, because the mean of its divisors is an integer number (51312922279).

Almost surely, 2^102625844557 is an apocalyptic number.

It is an amenable number.

102625844557 is a deficient number, since it is larger than the sum of its proper divisors (1).

102625844557 is an equidigital number, since it uses as much as digits as its factorization.

102625844557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688000, while the sum is 49.

The spelling of 102625844557 in words is "one hundred two billion, six hundred twenty-five million, eight hundred forty-four thousand, five hundred fifty-seven".