2550161556 has 84 divisors (see below), whose sum is σ = 6907200384. Its totient is φ = 822603600.

The previous prime is 2550161533. The next prime is 2550161557. The reversal of 2550161556 is 6551610552.

It is a super-2 number, since 2×2550161556² = 13006647923400682272, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2550161556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2550161557) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 76291 + ... + 104501.

It is an arithmetic number, because the mean of its divisors is an integer number (82228576).

Almost surely, 2^2550161556 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 2550161556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3453600192).

2550161556 is an abundant number, since it is smaller than the sum of its proper divisors (4357038828).

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

2550161556 is a wasteful number, since it uses less digits than its factorization.

2550161556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28264 (or 28247 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 2550161556 is about 50499.1243092393. The cubic root of 2550161556 is about 1366.2260593799.

The spelling of 2550161556 in words is "two billion, five hundred fifty million, one hundred sixty-one thousand, five hundred fifty-six".