2521159649856 has 147 divisors (see below), whose sum is σ = 7501978446483. Its totient is φ = 840272227200.

The previous prime is 2521159649803. The next prime is 2521159649861. The reversal of 2521159649856 is 6589469511252.

The square root of 2521159649856 is 1587816.

It is a perfect power (a square), and thus also a powerful number.

2521159649856 is a `hidden beast` number, since 2 + 5 + 2 + 1 + 1 + 5 + 96 + 498 + 56 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2521159649793 and 2521159649802.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 342964581 + ... + 342971931.

Almost surely, 2^{2521159649856} is an apocalyptic number.

2521159649856 is the 1587816-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2521159649856

2521159649856 is an abundant number, since it is smaller than the sum of its proper divisors (4980818796627).

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

2521159649856 is an frugal number, since it uses more digits than its factorization.

2521159649856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14732 (or 7356 counting only the distinct ones).

The product of its digits is 46656000, while the sum is 63.

The spelling of 2521159649856 in words is "two trillion, five hundred twenty-one billion, one hundred fifty-nine million, six hundred forty-nine thousand, eight hundred fifty-six".