16986772639 has 2 divisors, whose sum is σ = 16986772640. Its totient is φ = 16986772638.

The previous prime is 16986772603. The next prime is 16986772661. The reversal of 16986772639 is 93627768961.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16986772639 - 2¹⁵ = 16986739871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16986772139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8493386319 + 8493386320.

It is an arithmetic number, because the mean of its divisors is an integer number (8493386320).

Almost surely, 2^16986772639 is an apocalyptic number.

16986772639 is a deficient number, since it is larger than the sum of its proper divisors (1).

16986772639 is an equidigital number, since it uses as much as digits as its factorization.

16986772639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41150592, while the sum is 64.

The spelling of 16986772639 in words is "sixteen billion, nine hundred eighty-six million, seven hundred seventy-two thousand, six hundred thirty-nine".