323780641631 has 4 divisors (see below), whose sum is σ = 329088521064. Its totient is φ = 318472762200.

The previous prime is 323780641621. The next prime is 323780641643. The reversal of 323780641631 is 136146087323.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136146087323 = 23 ⋅5919395101.

It is a cyclic number.

It is not a de Polignac number, because 323780641631 - 2¹⁸ = 323780379487 is a prime.

It is a super-2 number, since 2×323780641631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323780641621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2653939625 + ... + 2653939746.

It is an arithmetic number, because the mean of its divisors is an integer number (82272130266).

Almost surely, 2^323780641631 is an apocalyptic number.

323780641631 is a deficient number, since it is larger than the sum of its proper divisors (5307879433).

323780641631 is an equidigital number, since it uses as much as digits as its factorization.

323780641631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5307879432.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 323780641631 in words is "three hundred twenty-three billion, seven hundred eighty million, six hundred forty-one thousand, six hundred thirty-one".