157171715851 has 2 divisors, whose sum is σ = 157171715852. Its totient is φ = 157171715850.

The previous prime is 157171715837. The next prime is 157171715917. The reversal of 157171715851 is 158517171751.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157171715851 - 2³¹ = 155024232203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157171715795 and 157171715804.

It is not a weakly prime, because it can be changed into another prime (157171715821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78585857925 + 78585857926.

It is an arithmetic number, because the mean of its divisors is an integer number (78585857926).

Almost surely, 2^157171715851 is an apocalyptic number.

157171715851 is a deficient number, since it is larger than the sum of its proper divisors (1).

157171715851 is an equidigital number, since it uses as much as digits as its factorization.

157171715851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 343000, while the sum is 49.

The spelling of 157171715851 in words is "one hundred fifty-seven billion, one hundred seventy-one million, seven hundred fifteen thousand, eight hundred fifty-one".