2045574908172 has 120 divisors (see below), whose sum is σ = 5424782932800. Its totient is φ = 672039224064.

The previous prime is 2045574908161. The next prime is 2045574908231. The reversal of 2045574908172 is 2718094755402.

2045574908172 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 5 + 7 + 490 + 81 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14493898 + ... + 14634350.

It is an arithmetic number, because the mean of its divisors is an integer number (45206524440).

Almost surely, 2^{2045574908172} 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 2045574908172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2712391466400).

2045574908172 is an abundant number, since it is smaller than the sum of its proper divisors (3379208024628).

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

2045574908172 is a wasteful number, since it uses less digits than its factorization.

2045574908172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141117 (or 141106 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 2045574908172 in words is "two trillion, forty-five billion, five hundred seventy-four million, nine hundred eight thousand, one hundred seventy-two".