16193454157 has 2 divisors, whose sum is σ = 16193454158. Its totient is φ = 16193454156.

The previous prime is 16193454143. The next prime is 16193454191. The reversal of 16193454157 is 75145439161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11074194756 + 5119259401 = 105234^2 + 71549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16193454157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16193454257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8096727078 + 8096727079.

It is an arithmetic number, because the mean of its divisors is an integer number (8096727079).

Almost surely, 2^16193454157 is an apocalyptic number.

It is an amenable number.

16193454157 is a deficient number, since it is larger than the sum of its proper divisors (1).

16193454157 is an equidigital number, since it uses as much as digits as its factorization.

16193454157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 46.

The spelling of 16193454157 in words is "sixteen billion, one hundred ninety-three million, four hundred fifty-four thousand, one hundred fifty-seven".