651977157 has 24 divisors (see below), whose sum is σ = 943184928. Its totient is φ = 400420800.

The previous prime is 651977147. The next prime is 651977171. The reversal of 651977157 is 751779156.

651977157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 651977157 - 2⁴ = 651977141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651977107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349407 + ... + 351267.

It is an arithmetic number, because the mean of its divisors is an integer number (39299372).

Almost surely, 2^651977157 is an apocalyptic number.

It is an amenable number.

651977157 is a deficient number, since it is larger than the sum of its proper divisors (291207771).

651977157 is a wasteful number, since it uses less digits than its factorization.

651977157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581 (or 2568 counting only the distinct ones).

The product of its digits is 463050, while the sum is 48.

The square root of 651977157 is about 25533.8433652280. The cubic root of 651977157 is about 867.1165192366.

The spelling of 651977157 in words is "six hundred fifty-one million, nine hundred seventy-seven thousand, one hundred fifty-seven".