157985135055 has 48 divisors (see below), whose sum is σ = 306809496864. Its totient is φ = 74528605440.

The previous prime is 157985135047. The next prime is 157985135059. The reversal of 157985135055 is 550531589751.

157985135055 is a `hidden beast` number, since 1 + 5 + 79 + 8 + 513 + 5 + 0 + 55 = 666.

It is not a de Polignac number, because 157985135055 - 2³ = 157985135047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157985134992 and 157985135010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157985135059) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4294684 + ... + 4331313.

It is an arithmetic number, because the mean of its divisors is an integer number (6391864518).

Almost surely, 2^157985135055 is an apocalyptic number.

157985135055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

157985135055 is a deficient number, since it is larger than the sum of its proper divisors (148824361809).

157985135055 is a wasteful number, since it uses less digits than its factorization.

157985135055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8626056 (or 8626053 counting only the distinct ones).

The product of its (nonzero) digits is 4725000, while the sum is 54.

The spelling of 157985135055 in words is "one hundred fifty-seven billion, nine hundred eighty-five million, one hundred thirty-five thousand, fifty-five".