31955360977 has 2 divisors, whose sum is σ = 31955360978. Its totient is φ = 31955360976.

The previous prime is 31955360953. The next prime is 31955360993. The reversal of 31955360977 is 77906355913.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31371848641 + 583512336 = 177121^2 + 24156^2 .

It is a cyclic number.

It is not a de Polignac number, because 31955360977 - 2⁷ = 31955360849 is a prime.

It is a super-2 number, since 2×31955360977² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31955360777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15977680488 + 15977680489.

It is an arithmetic number, because the mean of its divisors is an integer number (15977680489).

Almost surely, 2^31955360977 is an apocalyptic number.

It is an amenable number.

31955360977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31955360977 is an equidigital number, since it uses as much as digits as its factorization.

31955360977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5358150, while the sum is 55.

The spelling of 31955360977 in words is "thirty-one billion, nine hundred fifty-five million, three hundred sixty thousand, nine hundred seventy-seven".