2556737145 has 24 divisors (see below), whose sum is σ = 4435611336. Its totient is φ = 1362382848.

The previous prime is 2556737143. The next prime is 2556737149. The reversal of 2556737145 is 5417376552.

It is a happy number.

2556737145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 815844969 + 1740892176 = 28563^2 + 41724^2 .

It is not a de Polignac number, because 2556737145 - 2¹ = 2556737143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2556737145.

It is not an unprimeable number, because it can be changed into a prime (2556737143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27247 + ... + 76523.

It is an arithmetic number, because the mean of its divisors is an integer number (184817139).

Almost surely, 2^2556737145 is an apocalyptic number.

It is an amenable number.

2556737145 is a deficient number, since it is larger than the sum of its proper divisors (1878874191).

2556737145 is a wasteful number, since it uses less digits than its factorization.

2556737145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50441 (or 50438 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 2556737145 is about 50564.1883648892. The cubic root of 2556737145 is about 1367.3993223766.

The spelling of 2556737145 in words is "two billion, five hundred fifty-six million, seven hundred thirty-seven thousand, one hundred forty-five".