651051556 has 12 divisors (see below), whose sum is σ = 1170133468. Its totient is φ = 316727712.

The previous prime is 651051551. The next prime is 651051559. The reversal of 651051556 is 655150156.

It can be written as a sum of positive squares in 2 ways, for example, as 619512100 + 31539456 = 24890^2 + 5616^2 .

It is a super-2 number, since 2×651051556² = 847736257140042272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (651051551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2199351 + ... + 2199646.

Almost surely, 2^651051556 is an apocalyptic number.

It is an amenable number.

651051556 is a deficient number, since it is larger than the sum of its proper divisors (519081912).

651051556 is a wasteful number, since it uses less digits than its factorization.

651051556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399038 (or 4399036 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 651051556 is about 25515.7119438200. The cubic root of 651051556 is about 866.7059813198.

The spelling of 651051556 in words is "six hundred fifty-one million, fifty-one thousand, five hundred fifty-six".