1801238553516 has 48 divisors (see below), whose sum is σ = 4347988890336. Its totient is φ = 579921329664.

The previous prime is 1801238553449. The next prime is 1801238553523. The reversal of 1801238553516 is 6153558321081.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14745171 + ... + 14866826.

It is an arithmetic number, because the mean of its divisors is an integer number (90583101882).

Almost surely, 2^{1801238553516} is an apocalyptic number.

It is an amenable number.

1801238553516 is an abundant number, since it is smaller than the sum of its proper divisors (2546750336820).

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

1801238553516 is a wasteful number, since it uses less digits than its factorization.

1801238553516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29612178 (or 29612176 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 48.

The spelling of 1801238553516 in words is "one trillion, eight hundred one billion, two hundred thirty-eight million, five hundred fifty-three thousand, five hundred sixteen".