157171015505 has 16 divisors (see below), whose sum is σ = 219947779200. Its totient is φ = 107774409456.

The previous prime is 157171015487. The next prime is 157171015541. The reversal of 157171015505 is 505510171751.

157171015505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157171015505 - 2¹⁴ = 157170999121 is a prime.

It is a super-2 number, since 2×157171015505² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45820739 + ... + 45824168.

It is an arithmetic number, because the mean of its divisors is an integer number (13746736200).

Almost surely, 2^157171015505 is an apocalyptic number.

It is an amenable number.

157171015505 is a deficient number, since it is larger than the sum of its proper divisors (62776763695).

157171015505 is an frugal number, since it uses more digits than its factorization.

157171015505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91644933 (or 91644919 counting only the distinct ones).

The product of its (nonzero) digits is 30625, while the sum is 38.

The spelling of 157171015505 in words is "one hundred fifty-seven billion, one hundred seventy-one million, fifteen thousand, five hundred five".