3240406164520 has 128 divisors (see below), whose sum is σ = 8397910794240. Its totient is φ = 1102275083520.

The previous prime is 3240406164497. The next prime is 3240406164539. The reversal of 3240406164520 is 254616040423.

It is a super-2 number, since 2×3240406164520² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3240406164520.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275937769 + ... + 275949511.

It is an arithmetic number, because the mean of its divisors is an integer number (65608678080).

Almost surely, 2^{3240406164520} 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 3240406164520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4198955397120).

3240406164520 is an abundant number, since it is smaller than the sum of its proper divisors (5157504629720).

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

3240406164520 is a wasteful number, since it uses less digits than its factorization.

3240406164520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19415 (or 19411 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 3240406164520 in words is "three trillion, two hundred forty billion, four hundred six million, one hundred sixty-four thousand, five hundred twenty".