651389994 has 24 divisors (see below), whose sum is σ = 1411929792. Its totient is φ = 217040040.

The previous prime is 651389989. The next prime is 651390007. The reversal of 651389994 is 499983156.

651389994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 651389994.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48429 + ... + 60399.

It is an arithmetic number, because the mean of its divisors is an integer number (58830408).

Almost surely, 2^651389994 is an apocalyptic number.

651389994 is an abundant number, since it is smaller than the sum of its proper divisors (760539798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651389994 is a wasteful number, since it uses less digits than its factorization.

651389994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15002 (or 14999 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 651389994 is about 25522.3430350742. The cubic root of 651389994 is about 866.8561360574.

The spelling of 651389994 in words is "six hundred fifty-one million, three hundred eighty-nine thousand, nine hundred ninety-four".