1521047990826 has 48 divisors (see below), whose sum is σ = 4056127979904. Its totient is φ = 401155513632.

The previous prime is 1521047990783. The next prime is 1521047990879. The reversal of 1521047990826 is 6280997401251.

It is a happy number.

1521047990826 is a `hidden beast` number, since 1 + 5 + 2 + 1 + 0 + 479 + 90 + 82 + 6 = 666.

It is a super-2 number, since 2×1521047990826² (a number of 25 digits) contains 22 as substring.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 464298726 + ... + 464302001.

It is an arithmetic number, because the mean of its divisors is an integer number (84502666248).

Almost surely, 2^{1521047990826} is an apocalyptic number.

1521047990826 is an abundant number, since it is smaller than the sum of its proper divisors (2535079989078).

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

1521047990826 is a wasteful number, since it uses less digits than its factorization.

1521047990826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928600755 (or 928600752 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 1521047990826 in words is "one trillion, five hundred twenty-one billion, forty-seven million, nine hundred ninety thousand, eight hundred twenty-six".