2521757934 has 120 divisors (see below), whose sum is σ = 6107858328. Its totient is φ = 777288960.

The previous prime is 2521757933. The next prime is 2521757963. The reversal of 2521757934 is 4397571252.

It is a happy number.

2521757934 is a `hidden beast` number, since 25 + 21 + 7 + 579 + 34 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2521757934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521757933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2855457 + ... + 2856339.

Almost surely, 2^2521757934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2521757934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3053929164).

2521757934 is an abundant number, since it is smaller than the sum of its proper divisors (3586100394).

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

2521757934 is a wasteful number, since it uses less digits than its factorization.

2521757934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992 (or 966 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 2521757934 is about 50217.1079812448. The cubic root of 2521757934 is about 1361.1347820428.

The spelling of 2521757934 in words is "two billion, five hundred twenty-one million, seven hundred fifty-seven thousand, nine hundred thirty-four".