651125790 has 192 divisors, whose sum is σ = 2031644160. Its totient is φ = 146966400.

The previous prime is 651125771. The next prime is 651125803. The reversal of 651125790 is 97521156.

651125790 is a `hidden beast` number, since 6 + 511 + 2 + 57 + 90 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1717821 + ... + 1718199.

It is an arithmetic number, because the mean of its divisors is an integer number (10581480).

Almost surely, 2^651125790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651125790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015822080).

651125790 is an abundant number, since it is smaller than the sum of its proper divisors (1380518370).

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

651125790 is a wasteful number, since it uses less digits than its factorization.

651125790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 651125790 is about 25517.1665746807. The cubic root of 651125790 is about 866.7389211620.

The spelling of 651125790 in words is "six hundred fifty-one million, one hundred twenty-five thousand, seven hundred ninety".