651015045608 has 8 divisors (see below), whose sum is σ = 1220653210530. Its totient is φ = 325507522800.

The previous prime is 651015045587. The next prime is 651015045623. The reversal of 651015045608 is 806540510156.

It can be written as a sum of positive squares in only one way, i.e., 457487198884 + 193527846724 = 676378^2 + 439918^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40688440343 + ... + 40688440358.

Almost surely, 2^651015045608 is an apocalyptic number.

It is an amenable number.

651015045608 is a deficient number, since it is larger than the sum of its proper divisors (569638164922).

651015045608 is a wasteful number, since it uses less digits than its factorization.

651015045608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81376880707 (or 81376880703 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 651015045608 in words is "six hundred fifty-one billion, fifteen million, forty-five thousand, six hundred eight".