398533765401 has 12 divisors (see below), whose sum is σ = 576056635440. Its totient is φ = 265506060600.

The previous prime is 398533765379. The next prime is 398533765417. The reversal of 398533765401 is 104567335893.

398533765401 is a `hidden beast` number, since 3 + 9 + 8 + 533 + 7 + 65 + 40 + 1 = 666.

It is not a de Polignac number, because 398533765401 - 2¹⁵ = 398533732633 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (398533765451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15245911 + ... + 15272028.

It is an arithmetic number, because the mean of its divisors is an integer number (48004719620).

Almost surely, 2^398533765401 is an apocalyptic number.

It is an amenable number.

398533765401 is a deficient number, since it is larger than the sum of its proper divisors (177522870039).

398533765401 is a wasteful number, since it uses less digits than its factorization.

398533765401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30519396 (or 30519393 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 398533765401 in words is "three hundred ninety-eight billion, five hundred thirty-three million, seven hundred sixty-five thousand, four hundred one".