157715616617 has 8 divisors (see below), whose sum is σ = 169850675400. Its totient is φ = 145580999040.

The previous prime is 157715616593. The next prime is 157715616649. The reversal of 157715616617 is 716616517751.

It can be written as a sum of positive squares in 4 ways, for example, as 31460471641 + 126255144976 = 177371^2 + 355324^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157715616617 - 2²⁸ = 157447181161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157715016617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301117 + ... + 1417157.

It is an arithmetic number, because the mean of its divisors is an integer number (21231334425).

Almost surely, 2^157715616617 is an apocalyptic number.

It is an amenable number.

157715616617 is a deficient number, since it is larger than the sum of its proper divisors (12135058783).

157715616617 is a wasteful number, since it uses less digits than its factorization.

157715616617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220603.

The product of its digits is 1852200, while the sum is 53.

The spelling of 157715616617 in words is "one hundred fifty-seven billion, seven hundred fifteen million, six hundred sixteen thousand, six hundred seventeen".