157017121771 has 2 divisors, whose sum is σ = 157017121772. Its totient is φ = 157017121770.

The previous prime is 157017121769. The next prime is 157017121783. The reversal of 157017121771 is 177121710751.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (177121710751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157017121771 - 2¹ = 157017121769 is a prime.

Together with 157017121769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (157017121571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78508560885 + 78508560886.

It is an arithmetic number, because the mean of its divisors is an integer number (78508560886).

Almost surely, 2^157017121771 is an apocalyptic number.

157017121771 is a deficient number, since it is larger than the sum of its proper divisors (1).

157017121771 is an equidigital number, since it uses as much as digits as its factorization.

157017121771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24010, while the sum is 40.

The spelling of 157017121771 in words is "one hundred fifty-seven billion, seventeen million, one hundred twenty-one thousand, seven hundred seventy-one".