16839742477 has 2 divisors, whose sum is σ = 16839742478. Its totient is φ = 16839742476.

The previous prime is 16839742393. The next prime is 16839742483. The reversal of 16839742477 is 77424793861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16154664201 + 685078276 = 127101^2 + 26174^2 .

It is a cyclic number.

It is not a de Polignac number, because 16839742477 - 2³¹ = 14692258829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16839742487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8419871238 + 8419871239.

It is an arithmetic number, because the mean of its divisors is an integer number (8419871239).

Almost surely, 2^16839742477 is an apocalyptic number.

It is an amenable number.

16839742477 is a deficient number, since it is larger than the sum of its proper divisors (1).

16839742477 is an equidigital number, since it uses as much as digits as its factorization.

16839742477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14224896, while the sum is 58.

The spelling of 16839742477 in words is "sixteen billion, eight hundred thirty-nine million, seven hundred forty-two thousand, four hundred seventy-seven".