320135543240 has 32 divisors (see below), whose sum is σ = 720330944760. Its totient is φ = 128049600000.

The previous prime is 320135543237. The next prime is 320135543251. The reversal of 320135543240 is 42345531023.

It can be written as a sum of positive squares in 4 ways, for example, as 153800446276 + 166335096964 = 392174^2 + 407842^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320135543197 and 320135543206.

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, 1114490 + ... + 1371990.

Almost surely, 2^320135543240 is an apocalyptic number.

It is an amenable number.

320135543240 is an abundant number, since it is smaller than the sum of its proper divisors (400195401520).

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

320135543240 is a wasteful number, since it uses less digits than its factorization.

320135543240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288593 (or 288589 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

The spelling of 320135543240 in words is "three hundred twenty billion, one hundred thirty-five million, five hundred forty-three thousand, two hundred forty".