7951686477 has 16 divisors (see below), whose sum is σ = 12643676160. Its totient is φ = 4346263152.

The previous prime is 7951686401. The next prime is 7951686499. The reversal of 7951686477 is 7746861597.

It is not a de Polignac number, because 7951686477 - 2²⁴ = 7934909261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7951686477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7951686277) 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, 8231077 + ... + 8232042.

It is an arithmetic number, because the mean of its divisors is an integer number (790229760).

Almost surely, 2^7951686477 is an apocalyptic number.

It is an amenable number.

7951686477 is a deficient number, since it is larger than the sum of its proper divisors (4691989683).

7951686477 is a wasteful number, since it uses less digits than its factorization.

7951686477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16463152.

The product of its digits is 17781120, while the sum is 60.

The square root of 7951686477 is about 89172.2292925325. The cubic root of 7951686477 is about 1995.9657409318.

The spelling of 7951686477 in words is "seven billion, nine hundred fifty-one million, six hundred eighty-six thousand, four hundred seventy-seven".