7051081397991 has 8 divisors (see below), whose sum is σ = 9431478420720. Its totient is φ = 4685702653632.

The previous prime is 7051081397951. The next prime is 7051081398019. The reversal of 7051081397991 is 1997931801507.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7051081397991 - 2⁷ = 7051081397863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7051081397951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3754568496 + ... + 3754570373.

It is an arithmetic number, because the mean of its divisors is an integer number (1178934802590).

Almost surely, 2^{7051081397991} is an apocalyptic number.

7051081397991 is a deficient number, since it is larger than the sum of its proper divisors (2380397022729).

7051081397991 is a wasteful number, since it uses less digits than its factorization.

7051081397991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7509139185.

The product of its (nonzero) digits is 4286520, while the sum is 60.

The spelling of 7051081397991 in words is "seven trillion, fifty-one billion, eighty-one million, three hundred ninety-seven thousand, nine hundred ninety-one".