16898731957 has 2 divisors, whose sum is σ = 16898731958. Its totient is φ = 16898731956.

The previous prime is 16898731951. The next prime is 16898731963. The reversal of 16898731957 is 75913789861.

It is a balanced prime because it is at equal distance from previous prime (16898731951) and next prime (16898731963).

It can be written as a sum of positive squares in only one way, i.e., 12031018596 + 4867713361 = 109686^2 + 69769^2 .

It is a cyclic number.

It is not a de Polignac number, because 16898731957 - 2¹⁵ = 16898699189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16898731951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8449365978 + 8449365979.

It is an arithmetic number, because the mean of its divisors is an integer number (8449365979).

Almost surely, 2^16898731957 is an apocalyptic number.

It is an amenable number.

16898731957 is a deficient number, since it is larger than the sum of its proper divisors (1).

16898731957 is an equidigital number, since it uses as much as digits as its factorization.

16898731957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 64.

The spelling of 16898731957 in words is "sixteen billion, eight hundred ninety-eight million, seven hundred thirty-one thousand, nine hundred fifty-seven".