651591515166 has 16 divisors (see below), whose sum is σ = 1303201758864. Its totient is φ = 217194050304.

The previous prime is 651591515119. The next prime is 651591515207. The reversal of 651591515166 is 661515195156.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 305875 + ... + 1181838.

It is an arithmetic number, because the mean of its divisors is an integer number (81450109929).

Almost surely, 2^651591515166 is an apocalyptic number.

651591515166 is an abundant number, since it is smaller than the sum of its proper divisors (651610243698).

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

651591515166 is a wasteful number, since it uses less digits than its factorization.

651591515166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560715.

The product of its digits is 1215000, while the sum is 51.

The spelling of 651591515166 in words is "six hundred fifty-one billion, five hundred ninety-one million, five hundred fifteen thousand, one hundred sixty-six".