2521399320842 has 16 divisors (see below), whose sum is σ = 3806034462720. Its totient is φ = 1252726278768.

The previous prime is 2521399320833. The next prime is 2521399320967. The reversal of 2521399320842 is 2480239931252.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288842 + ... + 2264117.

It is an arithmetic number, because the mean of its divisors is an integer number (237877153920).

Almost surely, 2^{2521399320842} is an apocalyptic number.

2521399320842 is a deficient number, since it is larger than the sum of its proper divisors (1284635141878).

2521399320842 is a wasteful number, since it uses less digits than its factorization.

2521399320842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556085.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 2521399320842 in words is "two trillion, five hundred twenty-one billion, three hundred ninety-nine million, three hundred twenty thousand, eight hundred forty-two".