431661351141220 has 12 divisors (see below), whose sum is σ = 906488837396604. Its totient is φ = 172664540456480.

The previous prime is 431661351141203. The next prime is 431661351141271. The reversal of 431661351141220 is 22141153166134.

It can be written as a sum of positive squares in 2 ways, for example, as 211982651021376 + 219678700119844 = 14559624^2 + 14821562^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10791533778511 + ... + 10791533778550.

It is an arithmetic number, because the mean of its divisors is an integer number (75540736449717).

Almost surely, 2^{431661351141220} is an apocalyptic number.

It is an amenable number.

431661351141220 is an abundant number, since it is smaller than the sum of its proper divisors (474827486255384).

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

431661351141220 is a wasteful number, since it uses less digits than its factorization.

431661351141220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21583067557070 (or 21583067557068 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 431661351141220 in words is "four hundred thirty-one trillion, six hundred sixty-one billion, three hundred fifty-one million, one hundred forty-one thousand, two hundred twenty".