157663144665 has 48 divisors (see below), whose sum is σ = 298336186512. Its totient is φ = 76555487232.

The previous prime is 157663144547. The next prime is 157663144687. The reversal of 157663144665 is 566441366751.

157663144665 is a `hidden beast` number, since 1 + 57 + 66 + 31 + 446 + 65 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 37417872969 + 120245271696 = 193437^2 + 346764^2 .

It is not a de Polignac number, because 157663144665 - 2¹¹ = 157663142617 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1803252 + ... + 1888661.

It is an arithmetic number, because the mean of its divisors is an integer number (6215337219).

Almost surely, 2^157663144665 is an apocalyptic number.

157663144665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157663144665 is a deficient number, since it is larger than the sum of its proper divisors (140673041847).

157663144665 is a wasteful number, since it uses less digits than its factorization.

157663144665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3692010 (or 3692007 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 157663144665 in words is "one hundred fifty-seven billion, six hundred sixty-three million, one hundred forty-four thousand, six hundred sixty-five".