7081911957 has 4 divisors (see below), whose sum is σ = 9442549280. Its totient is φ = 4721274636.

The previous prime is 7081911953. The next prime is 7081911959. The reversal of 7081911957 is 7591191807.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7591191807 = 3 ⋅2530397269.

It is not a de Polignac number, because 7081911957 - 2² = 7081911953 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 (7081911953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180318657 + ... + 1180318662.

It is an arithmetic number, because the mean of its divisors is an integer number (2360637320).

Almost surely, 2^7081911957 is an apocalyptic number.

It is an amenable number.

7081911957 is a deficient number, since it is larger than the sum of its proper divisors (2360637323).

7081911957 is a wasteful number, since it uses less digits than its factorization.

7081911957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360637322.

The product of its (nonzero) digits is 158760, while the sum is 48.

The square root of 7081911957 is about 84154.0964956549. The cubic root of 7081911957 is about 1920.3637871335.

The spelling of 7081911957 in words is "seven billion, eighty-one million, nine hundred eleven thousand, nine hundred fifty-seven".