16156550257 has 2 divisors, whose sum is σ = 16156550258. Its totient is φ = 16156550256.

The previous prime is 16156550251. The next prime is 16156550309. The reversal of 16156550257 is 75205565161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15664775281 + 491774976 = 125159^2 + 22176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16156550257 is a prime.

It is a super-2 number, since 2×16156550257² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16156550251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8078275128 + 8078275129.

It is an arithmetic number, because the mean of its divisors is an integer number (8078275129).

Almost surely, 2^16156550257 is an apocalyptic number.

It is an amenable number.

16156550257 is a deficient number, since it is larger than the sum of its proper divisors (1).

16156550257 is an equidigital number, since it uses as much as digits as its factorization.

16156550257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315000, while the sum is 43.

The spelling of 16156550257 in words is "sixteen billion, one hundred fifty-six million, five hundred fifty thousand, two hundred fifty-seven".