391424880651 has 32 divisors (see below), whose sum is σ = 597510660096. Its totient is φ = 223276500000.

The previous prime is 391424880647. The next prime is 391424880667. The reversal of 391424880651 is 156088424193.

It is not a de Polignac number, because 391424880651 - 2² = 391424880647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 391424880594 and 391424880603.

It is not an unprimeable number, because it can be changed into a prime (391424880641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52529476 + ... + 52536926.

It is an arithmetic number, because the mean of its divisors is an integer number (18672208128).

Almost surely, 2^391424880651 is an apocalyptic number.

391424880651 is a deficient number, since it is larger than the sum of its proper divisors (206085779445).

391424880651 is a wasteful number, since it uses less digits than its factorization.

391424880651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11543.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 391424880651 in words is "three hundred ninety-one billion, four hundred twenty-four million, eight hundred eighty thousand, six hundred fifty-one".