651210916 has 6 divisors (see below), whose sum is σ = 1139619110. Its totient is φ = 325605456.

The previous prime is 651210853. The next prime is 651210919. The reversal of 651210916 is 619012156.

It can be written as a sum of positive squares in only one way, i.e., 650454016 + 756900 = 25504^2 + 870^2 .

It is not an unprimeable number, because it can be changed into a prime (651210919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81401361 + ... + 81401368.

Almost surely, 2^651210916 is an apocalyptic number.

It is an amenable number.

651210916 is a deficient number, since it is larger than the sum of its proper divisors (488408194).

651210916 is a wasteful number, since it uses less digits than its factorization.

651210916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162802733 (or 162802731 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 651210916 is about 25518.8345345159. The cubic root of 651210916 is about 866.7766910284.

The spelling of 651210916 in words is "six hundred fifty-one million, two hundred ten thousand, nine hundred sixteen".