40311993977 has 2 divisors, whose sum is σ = 40311993978. Its totient is φ = 40311993976.

The previous prime is 40311993961. The next prime is 40311993983. The reversal of 40311993977 is 77939911304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27743566096 + 12568427881 = 166564^2 + 112109^2 .

It is a cyclic number.

It is not a de Polignac number, because 40311993977 - 2⁴ = 40311993961 is a prime.

It is not a weakly prime, because it can be changed into another prime (40311993377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20155996988 + 20155996989.

It is an arithmetic number, because the mean of its divisors is an integer number (20155996989).

Almost surely, 2^40311993977 is an apocalyptic number.

It is an amenable number.

40311993977 is a deficient number, since it is larger than the sum of its proper divisors (1).

40311993977 is an equidigital number, since it uses as much as digits as its factorization.

40311993977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The spelling of 40311993977 in words is "forty billion, three hundred eleven million, nine hundred ninety-three thousand, nine hundred seventy-seven".