188781051157 has 2 divisors, whose sum is σ = 188781051158. Its totient is φ = 188781051156.

The previous prime is 188781051139. The next prime is 188781051233. The reversal of 188781051157 is 751150187881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184797674161 + 3983376996 = 429881^2 + 63114^2 .

It is a cyclic number.

It is not a de Polignac number, because 188781051157 - 2¹¹ = 188781049109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188781055157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94390525578 + 94390525579.

It is an arithmetic number, because the mean of its divisors is an integer number (94390525579).

Almost surely, 2^188781051157 is an apocalyptic number.

It is an amenable number.

188781051157 is a deficient number, since it is larger than the sum of its proper divisors (1).

188781051157 is an equidigital number, since it uses as much as digits as its factorization.

188781051157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 627200, while the sum is 52.

The spelling of 188781051157 in words is "one hundred eighty-eight billion, seven hundred eighty-one million, fifty-one thousand, one hundred fifty-seven".