2557760436 has 144 divisors (see below), whose sum is σ = 8330439040. Its totient is φ = 664329600.

The previous prime is 2557760399. The next prime is 2557760467. The reversal of 2557760436 is 6340677552.

2557760436 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 7 + 604 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2557760391 and 2557760400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77496 + ... + 105456.

Almost surely, 2^2557760436 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 2557760436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4165219520).

2557760436 is an abundant number, since it is smaller than the sum of its proper divisors (5772678604).

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

2557760436 is a wasteful number, since it uses less digits than its factorization.

2557760436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28003 (or 27984 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 45.

The square root of 2557760436 is about 50574.3060852050. The cubic root of 2557760436 is about 1367.5817242306.

It can be divided in two parts, 255776043 and 6, that added together give a square (255776049 = 15993²).

The spelling of 2557760436 in words is "two billion, five hundred fifty-seven million, seven hundred sixty thousand, four hundred thirty-six".