355661894977 has 2 divisors, whose sum is σ = 355661894978. Its totient is φ = 355661894976.

The previous prime is 355661894971. The next prime is 355661894981. The reversal of 355661894977 is 779498166553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355596349761 + 65545216 = 596319^2 + 8096^2 .

It is a cyclic number.

It is not a de Polignac number, because 355661894977 - 2¹⁵ = 355661862209 is a prime.

It is not a weakly prime, because it can be changed into another prime (355661894971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177830947488 + 177830947489.

It is an arithmetic number, because the mean of its divisors is an integer number (177830947489).

Almost surely, 2^355661894977 is an apocalyptic number.

It is an amenable number.

355661894977 is a deficient number, since it is larger than the sum of its proper divisors (1).

355661894977 is an equidigital number, since it uses as much as digits as its factorization.

355661894977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 342921600, while the sum is 70.

The spelling of 355661894977 in words is "three hundred fifty-five billion, six hundred sixty-one million, eight hundred ninety-four thousand, nine hundred seventy-seven".