651144923 has 12 divisors (see below), whose sum is σ = 770778624. Its totient is φ = 546414000.

The previous prime is 651144919. The next prime is 651144929. The reversal of 651144923 is 329441156.

It is not a de Polignac number, because 651144923 - 2² = 651144919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (651144929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205403 + ... + 208548.

It is an arithmetic number, because the mean of its divisors is an integer number (64231552).

Almost surely, 2^651144923 is an apocalyptic number.

651144923 is a deficient number, since it is larger than the sum of its proper divisors (119633701).

651144923 is a wasteful number, since it uses less digits than its factorization.

651144923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413986 (or 413975 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 651144923 is about 25517.5414764040. The cubic root of 651144923 is about 866.7474106396.

The spelling of 651144923 in words is "six hundred fifty-one million, one hundred forty-four thousand, nine hundred twenty-three".