16617978583 has 2 divisors, whose sum is σ = 16617978584. Its totient is φ = 16617978582.

The previous prime is 16617978523. The next prime is 16617978589. The reversal of 16617978583 is 38587971661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16617978583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16617978589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308989291 + 8308989292.

It is an arithmetic number, because the mean of its divisors is an integer number (8308989292).

Almost surely, 2^16617978583 is an apocalyptic number.

16617978583 is a deficient number, since it is larger than the sum of its proper divisors (1).

16617978583 is an equidigital number, since it uses as much as digits as its factorization.

16617978583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 61.

The spelling of 16617978583 in words is "sixteen billion, six hundred seventeen million, nine hundred seventy-eight thousand, five hundred eighty-three".