2745512172 has 144 divisors (see below), whose sum is σ = 8207271072. Its totient is φ = 795018240.

The previous prime is 2745512167. The next prime is 2745512173. The reversal of 2745512172 is 2712155472.

2745512172 is a `hidden beast` number, since 2 + 74 + 5 + 512 + 1 + 72 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2745512173) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 208422 + ... + 221202.

It is an arithmetic number, because the mean of its divisors is an integer number (56994938).

Almost surely, 2^2745512172 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 2745512172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4103635536).

2745512172 is an abundant number, since it is smaller than the sum of its proper divisors (5461758900).

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

2745512172 is a wasteful number, since it uses less digits than its factorization.

2745512172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12830 (or 12816 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 2745512172 is about 52397.6351756451. The cubic root of 2745512172 is about 1400.2571248822.

The spelling of 2745512172 in words is "two billion, seven hundred forty-five million, five hundred twelve thousand, one hundred seventy-two".