208956258732157 has 2 divisors, whose sum is σ = 208956258732158. Its totient is φ = 208956258732156.

The previous prime is 208956258732149. The next prime is 208956258732217. The reversal of 208956258732157 is 751237852659802.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164911082416441 + 44045176315716 = 12841771^2 + 6636654^2 .

It is a cyclic number.

It is not a de Polignac number, because 208956258732157 - 2³ = 208956258732149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208956258742157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104478129366078 + 104478129366079.

It is an arithmetic number, because the mean of its divisors is an integer number (104478129366079).

Almost surely, 2^{208956258732157} is an apocalyptic number.

It is an amenable number.

208956258732157 is a deficient number, since it is larger than the sum of its proper divisors (1).

208956258732157 is an equidigital number, since it uses as much as digits as its factorization.

208956258732157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032000, while the sum is 70.

The spelling of 208956258732157 in words is "two hundred eight trillion, nine hundred fifty-six billion, two hundred fifty-eight million, seven hundred thirty-two thousand, one hundred fifty-seven".