398953134505 has 32 divisors (see below), whose sum is σ = 505462982400. Its totient is φ = 301452440832.

The previous prime is 398953134499. The next prime is 398953134523. The reversal of 398953134505 is 505431359893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398953134505 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56115891 + ... + 56122999.

It is an arithmetic number, because the mean of its divisors is an integer number (15795718200).

Almost surely, 2^398953134505 is an apocalyptic number.

It is an amenable number.

398953134505 is a deficient number, since it is larger than the sum of its proper divisors (106509847895).

398953134505 is a wasteful number, since it uses less digits than its factorization.

398953134505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8833.

The product of its (nonzero) digits is 8748000, while the sum is 55.

It can be divided in two parts, 3989531 and 34505, that added together give a square (4024036 = 2006²).

The spelling of 398953134505 in words is "three hundred ninety-eight billion, nine hundred fifty-three million, one hundred thirty-four thousand, five hundred five".