321343062640 has 40 divisors (see below), whose sum is σ = 764497573488. Its totient is φ = 125547985920.

The previous prime is 321343062637. The next prime is 321343062653. The reversal of 321343062640 is 46260343123.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×321343062640² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321343062596 and 321343062605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46703401 + ... + 46710280.

Almost surely, 2^321343062640 is an apocalyptic number.

It is an amenable number.

321343062640 is an abundant number, since it is smaller than the sum of its proper divisors (443154510848).

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

321343062640 is a wasteful number, since it uses less digits than its factorization.

321343062640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93413737 (or 93413731 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 34.

The spelling of 321343062640 in words is "three hundred twenty-one billion, three hundred forty-three million, sixty-two thousand, six hundred forty".