102154273640557 has 2 divisors, whose sum is σ = 102154273640558. Its totient is φ = 102154273640556.

The previous prime is 102154273640477. The next prime is 102154273640593. The reversal of 102154273640557 is 755046372451201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53194179512356 + 48960094128201 = 7293434^2 + 6997149^2 .

It is a cyclic number.

It is not a de Polignac number, because 102154273640557 - 2⁷ = 102154273640429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102154273647557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51077136820278 + 51077136820279.

It is an arithmetic number, because the mean of its divisors is an integer number (51077136820279).

Almost surely, 2^{102154273640557} is an apocalyptic number.

It is an amenable number.

102154273640557 is a deficient number, since it is larger than the sum of its proper divisors (1).

102154273640557 is an equidigital number, since it uses as much as digits as its factorization.

102154273640557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056000, while the sum is 52.

The spelling of 102154273640557 in words is "one hundred two trillion, one hundred fifty-four billion, two hundred seventy-three million, six hundred forty thousand, five hundred fifty-seven".