2505621756 has 48 divisors (see below), whose sum is σ = 6406622208. Its totient is φ = 755865600.

The previous prime is 2505621731. The next prime is 2505621791. The reversal of 2505621756 is 6571265052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13125 + ... + 71996.

It is an arithmetic number, because the mean of its divisors is an integer number (133471296).

Almost surely, 2^2505621756 is an apocalyptic number.

It is an amenable number.

2505621756 is an abundant number, since it is smaller than the sum of its proper divisors (3901000452).

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

2505621756 is a wasteful number, since it uses less digits than its factorization.

2505621756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85362 (or 85360 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 2505621756 is about 50056.1859913438. The cubic root of 2505621756 is about 1358.2253662672.

The spelling of 2505621756 in words is "two billion, five hundred five million, six hundred twenty-one thousand, seven hundred fifty-six".