398878155575 has 24 divisors (see below), whose sum is σ = 495540545280. Its totient is φ = 318502080000.

The previous prime is 398878155563. The next prime is 398878155601. The reversal of 398878155575 is 575551878893.

It is not a de Polignac number, because 398878155575 - 2³⁴ = 381698286391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398878155499 and 398878155508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30674075 + ... + 30687075.

It is an arithmetic number, because the mean of its divisors is an integer number (20647522720).

Almost surely, 2^398878155575 is an apocalyptic number.

398878155575 is a deficient number, since it is larger than the sum of its proper divisors (96662389705).

398878155575 is a wasteful number, since it uses less digits than its factorization.

398878155575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15227 (or 15222 counting only the distinct ones).

The product of its digits is 423360000, while the sum is 71.

The spelling of 398878155575 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, one hundred fifty-five thousand, five hundred seventy-five".