16157581289 has 2 divisors, whose sum is σ = 16157581290. Its totient is φ = 16157581288.

The previous prime is 16157581283. The next prime is 16157581301. The reversal of 16157581289 is 98218575161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8137483264 + 8020098025 = 90208^2 + 89555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16157581289 is a prime.

It is a super-2 number, since 2×16157581289² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16157581289.

It is not a weakly prime, because it can be changed into another prime (16157581283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8078790644 + 8078790645.

It is an arithmetic number, because the mean of its divisors is an integer number (8078790645).

Almost surely, 2^16157581289 is an apocalyptic number.

It is an amenable number.

16157581289 is a deficient number, since it is larger than the sum of its proper divisors (1).

16157581289 is an equidigital number, since it uses as much as digits as its factorization.

16157581289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 53.

The spelling of 16157581289 in words is "sixteen billion, one hundred fifty-seven million, five hundred eighty-one thousand, two hundred eighty-nine".