2505543156 has 18 divisors (see below), whose sum is σ = 6333456402. Its totient is φ = 835181040.

The previous prime is 2505543149. The next prime is 2505543193. The reversal of 2505543156 is 6513455052.

2505543156 is a `hidden beast` number, since 2 + 50 + 554 + 3 + 1 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2326518756 + 179024400 = 48234^2 + 13380^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 69598421 = 2505543156 / (2 + 5 + 0 + 5 + 5 + 4 + 3 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 2505543156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34799175 + ... + 34799246.

It is an arithmetic number, because the mean of its divisors is an integer number (351858689).

Almost surely, 2^2505543156 is an apocalyptic number.

It is an amenable number.

2505543156 is an abundant number, since it is smaller than the sum of its proper divisors (3827913246).

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

2505543156 is a wasteful number, since it uses less digits than its factorization.

2505543156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69598431 (or 69598426 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 2505543156 is about 50055.4008674389. The cubic root of 2505543156 is about 1358.2111638535.

The spelling of 2505543156 in words is "two billion, five hundred five million, five hundred forty-three thousand, one hundred fifty-six".