321906881316 has 24 divisors (see below), whose sum is σ = 756519772960. Its totient is φ = 106530334272.

The previous prime is 321906881311. The next prime is 321906881321. The reversal of 321906881316 is 613188609123.

It is an interprime number because it is at equal distance from previous prime (321906881311) and next prime (321906881321).

It is not an unprimeable number, because it can be changed into a prime (321906881311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96493201 + ... + 96496536.

Almost surely, 2^321906881316 is an apocalyptic number.

It is an amenable number.

321906881316 is an abundant number, since it is smaller than the sum of its proper divisors (434612891644).

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

321906881316 is a wasteful number, since it uses less digits than its factorization.

321906881316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192989883 (or 192989881 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 321906881316 in words is "three hundred twenty-one billion, nine hundred six million, eight hundred eighty-one thousand, three hundred sixteen".