651116649990 has 32 divisors (see below), whose sum is σ = 1562797706976. Its totient is φ = 173618023680.

The previous prime is 651116649977. The next prime is 651116649991. The reversal of 651116649990 is 99946611156.

651116649990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 651116649990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651116649991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409567 + ... + 1212426.

It is an arithmetic number, because the mean of its divisors is an integer number (48837428343).

Almost surely, 2^651116649990 is an apocalyptic number.

651116649990 is an abundant number, since it is smaller than the sum of its proper divisors (911681056986).

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

651116649990 is a wasteful number, since it uses less digits than its factorization.

651116649990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635384.

The product of its (nonzero) digits is 3149280, while the sum is 57.

The spelling of 651116649990 in words is "six hundred fifty-one billion, one hundred sixteen million, six hundred forty-nine thousand, nine hundred ninety".