320778702732 has 48 divisors (see below), whose sum is σ = 761550809600. Its totient is φ = 105072327360.

The previous prime is 320778702731. The next prime is 320778702781. The reversal of 320778702732 is 237207877023.

It is a super-2 number, since 2×320778702732² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320778702731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601807 + ... + 1001862.

Almost surely, 2^320778702732 is an apocalyptic number.

It is an amenable number.

320778702732 is an abundant number, since it is smaller than the sum of its proper divisors (440772106868).

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

320778702732 is a wasteful number, since it uses less digits than its factorization.

320778702732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603966 (or 1603964 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 48.

The spelling of 320778702732 in words is "three hundred twenty billion, seven hundred seventy-eight million, seven hundred two thousand, seven hundred thirty-two".