3931620123551 has 2 divisors, whose sum is σ = 3931620123552. Its totient is φ = 3931620123550.

The previous prime is 3931620123527. The next prime is 3931620123553. The reversal of 3931620123551 is 1553210261393.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3931620123551 - 2¹⁰ = 3931620122527 is a prime.

It is a super-2 number, since 2×3931620123551² (a number of 26 digits) contains 22 as substring.

Together with 3931620123553, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3931620123499 and 3931620123508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3931620123553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965810061775 + 1965810061776.

It is an arithmetic number, because the mean of its divisors is an integer number (1965810061776).

Almost surely, 2^{3931620123551} is an apocalyptic number.

3931620123551 is a deficient number, since it is larger than the sum of its proper divisors (1).

3931620123551 is an equidigital number, since it uses as much as digits as its factorization.

3931620123551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 41.

The spelling of 3931620123551 in words is "three trillion, nine hundred thirty-one billion, six hundred twenty million, one hundred twenty-three thousand, five hundred fifty-one".