651135531156 has 96 divisors (see below), whose sum is σ = 1756810726272. Its totient is φ = 185508311040.

The previous prime is 651135531119. The next prime is 651135531157.

651135531156 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651135531157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1947790 + ... + 2257466.

It is an arithmetic number, because the mean of its divisors is an integer number (18300111732).

Almost surely, 2^651135531156 is an apocalyptic number.

651135531156 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651135531156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878405363136).

651135531156 is an abundant number, since it is smaller than the sum of its proper divisors (1105675195116).

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

651135531156 is a wasteful number, since it uses less digits than its factorization.

651135531156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310649 (or 310647 counting only the distinct ones).

The product of its digits is 202500, while the sum is 42.

The spelling of 651135531156 in words is "six hundred fifty-one billion, one hundred thirty-five million, five hundred thirty-one thousand, one hundred fifty-six".