321890393152 has 14 divisors (see below), whose sum is σ = 638751249038. Its totient is φ = 160945196544.

The previous prime is 321890393129. The next prime is 321890393173. The reversal of 321890393152 is 251393098123.

It can be written as a sum of positive squares in only one way, i.e., 310632334336 + 11258058816 = 557344^2 + 106104^2 .

It is a super-2 number, since 2×321890393152² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2514768633 + ... + 2514768760.

It is an arithmetic number, because the mean of its divisors is an integer number (45625089217).

Almost surely, 2^321890393152 is an apocalyptic number.

321890393152 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321890393152 is a deficient number, since it is larger than the sum of its proper divisors (316860855886).

321890393152 is an equidigital number, since it uses as much as digits as its factorization.

321890393152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029537405 (or 5029537395 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 321890393152 in words is "three hundred twenty-one billion, eight hundred ninety million, three hundred ninety-three thousand, one hundred fifty-two".