389265668491 has 16 divisors (see below), whose sum is σ = 457091317440. Its totient is φ = 324501690240.

The previous prime is 389265668471. The next prime is 389265668507. The reversal of 389265668491 is 194866562983.

It is not a de Polignac number, because 389265668491 - 2¹³ = 389265660299 is a prime.

It is a super-2 number, since 2×389265668491² (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 (389265668471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301065 + ... + 932293.

It is an arithmetic number, because the mean of its divisors is an integer number (28568207340).

Almost surely, 2^389265668491 is an apocalyptic number.

389265668491 is a deficient number, since it is larger than the sum of its proper divisors (67825648949).

389265668491 is a wasteful number, since it uses less digits than its factorization.

389265668491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633654.

The product of its digits is 134369280, while the sum is 67.

The spelling of 389265668491 in words is "three hundred eighty-nine billion, two hundred sixty-five million, six hundred sixty-eight thousand, four hundred ninety-one".