40861246931 has 2 divisors, whose sum is σ = 40861246932. Its totient is φ = 40861246930.

The previous prime is 40861246871. The next prime is 40861246963. The reversal of 40861246931 is 13964216804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40861246931 is a prime.

It is a super-2 number, since 2×40861246931² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40861246831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20430623465 + 20430623466.

It is an arithmetic number, because the mean of its divisors is an integer number (20430623466).

Almost surely, 2^40861246931 is an apocalyptic number.

40861246931 is a deficient number, since it is larger than the sum of its proper divisors (1).

40861246931 is an equidigital number, since it uses as much as digits as its factorization.

40861246931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 40861246931 in words is "forty billion, eight hundred sixty-one million, two hundred forty-six thousand, nine hundred thirty-one".