2645215618560 has 320 divisors, whose sum is σ = 8833402626048. Its totient is φ = 674010005504.

The previous prime is 2645215618547. The next prime is 2645215618627. The reversal of 2645215618560 is 658165125462.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178928929 + ... + 178943711.

Almost surely, 2^{2645215618560} is an apocalyptic number.

2645215618560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2645215618560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4416701313024).

2645215618560 is an abundant number, since it is smaller than the sum of its proper divisors (6188187007488).

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

2645215618560 is a wasteful number, since it uses less digits than its factorization.

2645215618560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15845 (or 15829 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 2645215618560 in words is "two trillion, six hundred forty-five billion, two hundred fifteen million, six hundred eighteen thousand, five hundred sixty".