3215490640872 has 64 divisors (see below), whose sum is σ = 8262058708800. Its totient is φ = 1042095191040.

The previous prime is 3215490640871. The next prime is 3215490640903. The reversal of 3215490640872 is 2780460945123.

It is not an unprimeable number, because it can be changed into a prime (3215490640871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121722 + ... + 2538857.

It is an arithmetic number, because the mean of its divisors is an integer number (129094667325).

It is a 1-persistent number, because it is pandigital, but 2⋅3215490640872 = 6430981281744 is not.

Almost surely, 2^{3215490640872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3215490640872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4131029354400).

3215490640872 is an abundant number, since it is smaller than the sum of its proper divisors (5046568067928).

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

3215490640872 is a wasteful number, since it uses less digits than its factorization.

3215490640872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661986 (or 2661982 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 3215490640872 in words is "three trillion, two hundred fifteen billion, four hundred ninety million, six hundred forty thousand, eight hundred seventy-two".