431611664140 has 96 divisors (see below), whose sum is σ = 971847979200. Its totient is φ = 160437657600.

The previous prime is 431611664131. The next prime is 431611664219. The reversal of 431611664140 is 41466116134.

It is a self number, because there is not a number n which added to its sum of digits gives 431611664140.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22352490 + ... + 22371790.

It is an arithmetic number, because the mean of its divisors is an integer number (10123416450).

Almost surely, 2^431611664140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431611664140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485923989600).

431611664140 is an abundant number, since it is smaller than the sum of its proper divisors (540236315060).

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

431611664140 is a wasteful number, since it uses less digits than its factorization.

431611664140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20155 (or 20153 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 431611664140 in words is "four hundred thirty-one billion, six hundred eleven million, six hundred sixty-four thousand, one hundred forty".