17992127477 has 2 divisors, whose sum is σ = 17992127478. Its totient is φ = 17992127476.

The previous prime is 17992127437. The next prime is 17992127521. The reversal of 17992127477 is 77472129971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9245014801 + 8747112676 = 96151^2 + 93526^2 .

It is a cyclic number.

It is not a de Polignac number, because 17992127477 - 2¹² = 17992123381 is a prime.

It is a super-2 number, since 2×17992127477² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17992127437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8996063738 + 8996063739.

It is an arithmetic number, because the mean of its divisors is an integer number (8996063739).

Almost surely, 2^17992127477 is an apocalyptic number.

It is an amenable number.

17992127477 is a deficient number, since it is larger than the sum of its proper divisors (1).

17992127477 is an equidigital number, since it uses as much as digits as its factorization.

17992127477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3111696, while the sum is 56.

The spelling of 17992127477 in words is "seventeen billion, nine hundred ninety-two million, one hundred twenty-seven thousand, four hundred seventy-seven".