651463665044 has 12 divisors (see below), whose sum is σ = 1167867790068. Its totient is φ = 317787153600.

The previous prime is 651463665043. The next prime is 651463665059. The reversal of 651463665044 is 440566364156.

It can be written as a sum of positive squares in 2 ways, for example, as 325171376644 + 326292288400 = 570238^2 + 571220^2 .

It is a super-2 number, since 2×651463665044² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 651463664983 and 651463665001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651463665043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1986169547 + ... + 1986169874.

It is an arithmetic number, because the mean of its divisors is an integer number (97322315839).

Almost surely, 2^651463665044 is an apocalyptic number.

It is an amenable number.

651463665044 is a deficient number, since it is larger than the sum of its proper divisors (516404125024).

651463665044 is a wasteful number, since it uses less digits than its factorization.

651463665044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3972339466 (or 3972339464 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 50.

The spelling of 651463665044 in words is "six hundred fifty-one billion, four hundred sixty-three million, six hundred sixty-five thousand, forty-four".