7811929040381 has 2 divisors, whose sum is σ = 7811929040382. Its totient is φ = 7811929040380.

The previous prime is 7811929040341. The next prime is 7811929040387. The reversal of 7811929040381 is 1830409291187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7325499512356 + 486429528025 = 2706566^2 + 697445^2 .

It is a cyclic number.

It is not a de Polignac number, because 7811929040381 - 2³⁴ = 7794749171197 is a prime.

It is a super-2 number, since 2×7811929040381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7811929040387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3905964520190 + 3905964520191.

It is an arithmetic number, because the mean of its divisors is an integer number (3905964520191).

Almost surely, 2^{7811929040381} is an apocalyptic number.

It is an amenable number.

7811929040381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7811929040381 is an equidigital number, since it uses as much as digits as its factorization.

7811929040381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 7811929040381 in words is "seven trillion, eight hundred eleven billion, nine hundred twenty-nine million, forty thousand, three hundred eighty-one".