651764140 has 24 divisors (see below), whose sum is σ = 1385198640. Its totient is φ = 257563968.

The previous prime is 651764129. The next prime is 651764149. The reversal of 651764140 is 41467156.

It is a junction number, because it is equal to n+sod(n) for n = 651764096 and 651764105.

It is not an unprimeable number, because it can be changed into a prime (651764149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194655 + ... + 197974.

It is an arithmetic number, because the mean of its divisors is an integer number (57716610).

Almost surely, 2^651764140 is an apocalyptic number.

It is an amenable number.

651764140 is an abundant number, since it is smaller than the sum of its proper divisors (733434500).

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

651764140 is a wasteful number, since it uses less digits than its factorization.

651764140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392721 (or 392719 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 651764140 is about 25529.6717566051. The cubic root of 651764140 is about 867.0220728399.

The spelling of 651764140 in words is "six hundred fifty-one million, seven hundred sixty-four thousand, one hundred forty".