389198742491 has 6 divisors (see below), whose sum is σ = 421440058620. Its totient is φ = 359260377528.

The previous prime is 389198742487. The next prime is 389198742551. The reversal of 389198742491 is 194247891983.

It is not a de Polignac number, because 389198742491 - 2² = 389198742487 is a prime.

It is a super-2 number, since 2×389198742491² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389198732491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1151475401 + ... + 1151475738.

It is an arithmetic number, because the mean of its divisors is an integer number (70240009770).

Almost surely, 2^389198742491 is an apocalyptic number.

389198742491 is a deficient number, since it is larger than the sum of its proper divisors (32241316129).

389198742491 is a wasteful number, since it uses less digits than its factorization.

389198742491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302951165 (or 2302951152 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 65.

The spelling of 389198742491 in words is "three hundred eighty-nine billion, one hundred ninety-eight million, seven hundred forty-two thousand, four hundred ninety-one".