425166539491 has 16 divisors (see below), whose sum is σ = 482066749440. Its totient is φ = 372848477760.

The previous prime is 425166539489. The next prime is 425166539507. The reversal of 425166539491 is 194935661524.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 425166539491 - 2¹ = 425166539489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425166530491) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15678730 + ... + 15705823.

It is an arithmetic number, because the mean of its divisors is an integer number (30129171840).

Almost surely, 2^425166539491 is an apocalyptic number.

425166539491 is a deficient number, since it is larger than the sum of its proper divisors (56900209949).

425166539491 is a wasteful number, since it uses less digits than its factorization.

425166539491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31384626.

The product of its digits is 6998400, while the sum is 55.

The spelling of 425166539491 in words is "four hundred twenty-five billion, one hundred sixty-six million, five hundred thirty-nine thousand, four hundred ninety-one".