16157581189 has 4 divisors (see below), whose sum is σ = 16181590156. Its totient is φ = 16133572224.

The previous prime is 16157581157. The next prime is 16157581249. The reversal of 16157581189 is 98118575161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98118575161 = 23 ⋅4266025007.

It can be written as a sum of positive squares in 2 ways, for example, as 2317941025 + 13839640164 = 48145^2 + 117642^2 .

It is a cyclic number.

It is not a de Polignac number, because 16157581189 - 2⁵ = 16157581157 is a prime.

It is a super-2 number, since 2×16157581189² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16157581289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12003474 + ... + 12004819.

It is an arithmetic number, because the mean of its divisors is an integer number (4045397539).

Almost surely, 2^16157581189 is an apocalyptic number.

It is an amenable number.

16157581189 is a deficient number, since it is larger than the sum of its proper divisors (24008967).

16157581189 is an equidigital number, since it uses as much as digits as its factorization.

16157581189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24008966.

The product of its digits is 604800, while the sum is 52.

The spelling of 16157581189 in words is "sixteen billion, one hundred fifty-seven million, five hundred eighty-one thousand, one hundred eighty-nine".