555961974691 has 2 divisors, whose sum is σ = 555961974692. Its totient is φ = 555961974690.

The previous prime is 555961974677. The next prime is 555961974739. The reversal of 555961974691 is 196479169555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555961974691 - 2⁹ = 555961974179 is a prime.

It is a super-2 number, since 2×555961974691² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (555961974661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277980987345 + 277980987346.

It is an arithmetic number, because the mean of its divisors is an integer number (277980987346).

Almost surely, 2^555961974691 is an apocalyptic number.

555961974691 is a deficient number, since it is larger than the sum of its proper divisors (1).

555961974691 is an equidigital number, since it uses as much as digits as its factorization.

555961974691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854000, while the sum is 67.

The spelling of 555961974691 in words is "five hundred fifty-five billion, nine hundred sixty-one million, nine hundred seventy-four thousand, six hundred ninety-one".