398773915554 has 16 divisors (see below), whose sum is σ = 911483235648. Its totient is φ = 113935404432.

The previous prime is 398773915513. The next prime is 398773915559. The reversal of 398773915554 is 455519377893.

It is not an unprimeable number, because it can be changed into a prime (398773915559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4747308477 + ... + 4747308560.

It is an arithmetic number, because the mean of its divisors is an integer number (56967702228).

Almost surely, 2^398773915554 is an apocalyptic number.

398773915554 is an abundant number, since it is smaller than the sum of its proper divisors (512709320094).

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

398773915554 is a wasteful number, since it uses less digits than its factorization.

398773915554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9494617049.

The product of its digits is 142884000, while the sum is 66.

The spelling of 398773915554 in words is "three hundred ninety-eight billion, seven hundred seventy-three million, nine hundred fifteen thousand, five hundred fifty-four".