7926806981951 has 16 divisors (see below), whose sum is σ = 9313892300160. Its totient is φ = 6650951783520.

The previous prime is 7926806981867. The next prime is 7926806981957. The reversal of 7926806981951 is 1591896086297.

It is a de Polignac number, because none of the positive numbers 2^k-7926806981951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7926806981957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2764121 + ... + 4847058.

It is an arithmetic number, because the mean of its divisors is an integer number (582118268760).

Almost surely, 2^{7926806981951} is an apocalyptic number.

7926806981951 is a deficient number, since it is larger than the sum of its proper divisors (1387085318209).

7926806981951 is a wasteful number, since it uses less digits than its factorization.

7926806981951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7618486.

The product of its (nonzero) digits is 117573120, while the sum is 71.

The spelling of 7926806981951 in words is "seven trillion, nine hundred twenty-six billion, eight hundred six million, nine hundred eighty-one thousand, nine hundred fifty-one".