3256742787820 has 12 divisors (see below), whose sum is σ = 6839159854464. Its totient is φ = 1302697115120.

The previous prime is 3256742787817. The next prime is 3256742787821. The reversal of 3256742787820 is 287872476523.

It is not an unprimeable number, because it can be changed into a prime (3256742787821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81418569676 + ... + 81418569715.

It is an arithmetic number, because the mean of its divisors is an integer number (569929987872).

Almost surely, 2^{3256742787820} is an apocalyptic number.

It is an amenable number.

3256742787820 is an abundant number, since it is smaller than the sum of its proper divisors (3582417066644).

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

3256742787820 is a wasteful number, since it uses less digits than its factorization.

3256742787820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162837139400 (or 162837139398 counting only the distinct ones).

The product of its (nonzero) digits is 63221760, while the sum is 61.

The spelling of 3256742787820 in words is "three trillion, two hundred fifty-six billion, seven hundred forty-two million, seven hundred eighty-seven thousand, eight hundred twenty".