398252568081 has 16 divisors (see below), whose sum is σ = 555074758656. Its totient is φ = 253507054416.

The previous prime is 398252568031. The next prime is 398252568089. The reversal of 398252568081 is 180865252893.

It is not a de Polignac number, because 398252568081 - 2⁷ = 398252567953 is a prime.

It is a super-2 number, since 2×398252568081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398252568089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5087065 + ... + 5164758.

It is an arithmetic number, because the mean of its divisors is an integer number (34692172416).

Almost surely, 2^398252568081 is an apocalyptic number.

It is an amenable number.

398252568081 is a deficient number, since it is larger than the sum of its proper divisors (156822190575).

398252568081 is a wasteful number, since it uses less digits than its factorization.

398252568081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10252412.

The product of its (nonzero) digits is 8294400, while the sum is 57.

The spelling of 398252568081 in words is "three hundred ninety-eight billion, two hundred fifty-two million, five hundred sixty-eight thousand, eighty-one".