651125726 has 4 divisors (see below), whose sum is σ = 976688592. Its totient is φ = 325562862.

The previous prime is 651125707. The next prime is 651125731. The reversal of 651125726 is 627521156.

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

It is a super-2 number, since 2×651125726² = 847929422118054152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 162781430 + ... + 162781433.

It is an arithmetic number, because the mean of its divisors is an integer number (244172148).

Almost surely, 2^651125726 is an apocalyptic number.

651125726 is a deficient number, since it is larger than the sum of its proper divisors (325562866).

651125726 is a wasteful number, since it uses less digits than its factorization.

651125726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325562865.

The product of its digits is 25200, while the sum is 35.

The square root of 651125726 is about 25517.1653206229. The cubic root of 651125726 is about 866.7388927644.

The spelling of 651125726 in words is "six hundred fifty-one million, one hundred twenty-five thousand, seven hundred twenty-six".