651400564 has 6 divisors (see below), whose sum is σ = 1139950994. Its totient is φ = 325700280.

The previous prime is 651400559. The next prime is 651400567. The reversal of 651400564 is 465004156.

It can be written as a sum of positive squares in only one way, i.e., 499075600 + 152324964 = 22340^2 + 12342^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651400567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81425067 + ... + 81425074.

Almost surely, 2^651400564 is an apocalyptic number.

It is an amenable number.

651400564 is a deficient number, since it is larger than the sum of its proper divisors (488550430).

651400564 is a wasteful number, since it uses less digits than its factorization.

651400564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162850145 (or 162850143 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 651400564 is about 25522.5501076989. The cubic root of 651400564 is about 866.8608248101.

The spelling of 651400564 in words is "six hundred fifty-one million, four hundred thousand, five hundred sixty-four".