2521646036 has 72 divisors (see below), whose sum is σ = 5611114656. Its totient is φ = 982618560.

The previous prime is 2521645979. The next prime is 2521646041. The reversal of 2521646036 is 6306461252.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2521645987 and 2521646005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163331 + ... + 178101.

It is an arithmetic number, because the mean of its divisors is an integer number (77932148).

Almost surely, 2^2521646036 is an apocalyptic number.

2521646036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2521646036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2805557328).

2521646036 is an abundant number, since it is smaller than the sum of its proper divisors (3089468620).

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

2521646036 is a wasteful number, since it uses less digits than its factorization.

2521646036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14869 (or 14860 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 2521646036 is about 50215.9938266684. The cubic root of 2521646036 is about 1361.1146491941.

The spelling of 2521646036 in words is "two billion, five hundred twenty-one million, six hundred forty-six thousand, thirty-six".