461931990511 has 2 divisors, whose sum is σ = 461931990512. Its totient is φ = 461931990510.

The previous prime is 461931990431. The next prime is 461931990529. The reversal of 461931990511 is 115099139164.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 461931990511 - 2⁹ = 461931989999 is a prime.

It is a super-2 number, since 2×461931990511² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461931990211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230965995255 + 230965995256.

It is an arithmetic number, because the mean of its divisors is an integer number (230965995256).

Almost surely, 2^461931990511 is an apocalyptic number.

461931990511 is a deficient number, since it is larger than the sum of its proper divisors (1).

461931990511 is an equidigital number, since it uses as much as digits as its factorization.

461931990511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 49.

The spelling of 461931990511 in words is "four hundred sixty-one billion, nine hundred thirty-one million, nine hundred ninety thousand, five hundred eleven".