398456065815 has 48 divisors (see below), whose sum is σ = 682327328256. Its totient is φ = 198489412800.

The previous prime is 398456065807. The next prime is 398456065837. The reversal of 398456065815 is 518560654893.

It is not a de Polignac number, because 398456065815 - 2³ = 398456065807 is a prime.

It is a super-2 number, since 2×398456065815² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133731 + ... + 902660.

It is an arithmetic number, because the mean of its divisors is an integer number (14215152672).

Almost surely, 2^398456065815 is an apocalyptic number.

398456065815 is a deficient number, since it is larger than the sum of its proper divisors (283871262441).

398456065815 is a wasteful number, since it uses less digits than its factorization.

398456065815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036508 (or 1036489 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 60.

The spelling of 398456065815 in words is "three hundred ninety-eight billion, four hundred fifty-six million, sixty-five thousand, eight hundred fifteen".