651797986804 has 6 divisors (see below), whose sum is σ = 1140646476914. Its totient is φ = 325898993400.

The previous prime is 651797986783. The next prime is 651797986811. The reversal of 651797986804 is 408689797156.

It can be written as a sum of positive squares in only one way, i.e., 451183576804 + 200614410000 = 671702^2 + 447900^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81474748347 + ... + 81474748354.

Almost surely, 2^651797986804 is an apocalyptic number.

It is an amenable number.

651797986804 is a deficient number, since it is larger than the sum of its proper divisors (488848490110).

651797986804 is a wasteful number, since it uses less digits than its factorization.

651797986804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162949496705 (or 162949496703 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 70.

The spelling of 651797986804 in words is "six hundred fifty-one billion, seven hundred ninety-seven million, nine hundred eighty-six thousand, eight hundred four".