7978837286951 has 4 divisors (see below), whose sum is σ = 7986110612832. Its totient is φ = 7971563961072.

The previous prime is 7978837286929. The next prime is 7978837287011. The reversal of 7978837286951 is 1596827388797.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7978837286951 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 (7978837486951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3636661295 + ... + 3636663488.

It is an arithmetic number, because the mean of its divisors is an integer number (1996527653208).

Almost surely, 2^{7978837286951} is an apocalyptic number.

7978837286951 is a deficient number, since it is larger than the sum of its proper divisors (7273325881).

7978837286951 is a wasteful number, since it uses less digits than its factorization.

7978837286951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7273325880.

The product of its digits is 2560481280, while the sum is 80.

The spelling of 7978837286951 in words is "seven trillion, nine hundred seventy-eight billion, eight hundred thirty-seven million, two hundred eighty-six thousand, nine hundred fifty-one".