909990095557 has 2 divisors, whose sum is σ = 909990095558. Its totient is φ = 909990095556.

The previous prime is 909990095543. The next prime is 909990095569. The reversal of 909990095557 is 755590099909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690770427876 + 219219667681 = 831126^2 + 468209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-909990095557 is a prime.

It is a super-2 number, since 2×909990095557² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 909990095492 and 909990095501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (909990095587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454995047778 + 454995047779.

It is an arithmetic number, because the mean of its divisors is an integer number (454995047779).

Almost surely, 2^909990095557 is an apocalyptic number.

It is an amenable number.

909990095557 is a deficient number, since it is larger than the sum of its proper divisors (1).

909990095557 is an equidigital number, since it uses as much as digits as its factorization.

909990095557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51667875, while the sum is 67.

The spelling of 909990095557 in words is "nine hundred nine billion, nine hundred ninety million, ninety-five thousand, five hundred fifty-seven".