651623360164 has 48 divisors (see below), whose sum is σ = 1409268091392. Its totient is φ = 257247332352.

The previous prime is 651623360161. The next prime is 651623360233. The reversal of 651623360164 is 461063326156.

It is a super-2 number, since 2×651623360164² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 651623360164.

It is not an unprimeable number, because it can be changed into a prime (651623360161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14540997 + ... + 14585740.

It is an arithmetic number, because the mean of its divisors is an integer number (29359751904).

Almost surely, 2^651623360164 is an apocalyptic number.

It is an amenable number.

651623360164 is an abundant number, since it is smaller than the sum of its proper divisors (757644731228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651623360164 is a wasteful number, since it uses less digits than its factorization.

651623360164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29126812 (or 29126810 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 651623360164 in words is "six hundred fifty-one billion, six hundred twenty-three million, three hundred sixty thousand, one hundred sixty-four".