651052764 has 18 divisors (see below), whose sum is σ = 1645716800. Its totient is φ = 217017576.

The previous prime is 651052741. The next prime is 651052769. The reversal of 651052764 is 467250156.

It is a happy number.

651052764 is a `hidden beast` number, since 65 + 10 + 527 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 18084799 = 651052764 / (6 + 5 + 1 + 0 + 5 + 2 + 7 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651052769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9042364 + ... + 9042435.

Almost surely, 2^651052764 is an apocalyptic number.

It is an amenable number.

651052764 is an abundant number, since it is smaller than the sum of its proper divisors (994664036).

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

651052764 is a wasteful number, since it uses less digits than its factorization.

651052764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18084809 (or 18084804 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 651052764 is about 25515.7356154981. The cubic root of 651052764 is about 866.7065173655.

The spelling of 651052764 in words is "six hundred fifty-one million, fifty-two thousand, seven hundred sixty-four".