431161320664650 has 48 divisors (see below), whose sum is σ = 1069340599116000. Its totient is φ = 114969844234560.

The previous prime is 431161320664637. The next prime is 431161320664667. The reversal of 431161320664650 is 56466023161134.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 431161320664650.

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 23 ways as a sum of consecutive naturals, for example, 78690100 + ... + 83990799.

It is an arithmetic number, because the mean of its divisors is an integer number (22277929148250).

Almost surely, 2^{431161320664650} is an apocalyptic number.

431161320664650 is an abundant number, since it is smaller than the sum of its proper divisors (638179278451350).

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

431161320664650 is a wasteful number, since it uses less digits than its factorization.

431161320664650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162698583 (or 162698578 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 48.

It can be divided in two parts, 431161 and 320664650, that added together give a triangular number (321095811 = T₂₅₃₄₁).

The spelling of 431161320664650 in words is "four hundred thirty-one trillion, one hundred sixty-one billion, three hundred twenty million, six hundred sixty-four thousand, six hundred fifty".