651631326126510 has 128 divisors (see below), whose sum is σ = 1660898421504000. Its totient is φ = 163054276982784.

The previous prime is 651631326126497. The next prime is 651631326126511. The reversal of 651631326126510 is 15621623136156.

It is a self number, because there is not a number n which added to its sum of digits gives 651631326126510.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651631326126511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 654410332 + ... + 655405328.

It is an arithmetic number, because the mean of its divisors is an integer number (12975768918000).

Almost surely, 2^{651631326126510} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651631326126510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830449210752000).

651631326126510 is an abundant number, since it is smaller than the sum of its proper divisors (1009267095377490).

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

651631326126510 is a wasteful number, since it uses less digits than its factorization.

651631326126510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998890.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 651631326126510 in words is "six hundred fifty-one trillion, six hundred thirty-one billion, three hundred twenty-six million, one hundred twenty-six thousand, five hundred ten".