157131861684217 has 16 divisors (see below), whose sum is σ = 183245321958400. Its totient is φ = 134683594105536.

The previous prime is 157131861684211. The next prime is 157131861684263. The reversal of 157131861684217 is 712486168131751.

It is not a de Polignac number, because 157131861684217 - 2¹⁹ = 157131861159929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157131861684211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55664593 + ... + 58419265.

It is an arithmetic number, because the mean of its divisors is an integer number (11452832622400).

Almost surely, 2^{157131861684217} is an apocalyptic number.

It is an amenable number.

157131861684217 is a deficient number, since it is larger than the sum of its proper divisors (26113460274183).

157131861684217 is an equidigital number, since it uses as much as digits as its factorization.

157131861684217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920997 (or 2920983 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 61.

The spelling of 157131861684217 in words is "one hundred fifty-seven trillion, one hundred thirty-one billion, eight hundred sixty-one million, six hundred eighty-four thousand, two hundred seventeen".