157661272 has 8 divisors (see below), whose sum is σ = 295614900. Its totient is φ = 78830632.

The previous prime is 157661201. The next prime is 157661291. The reversal of 157661272 is 272166751.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9853822 + ... + 9853837.

Almost surely, 2^157661272 is an apocalyptic number.

It is an amenable number.

157661272 is a deficient number, since it is larger than the sum of its proper divisors (137953628).

157661272 is a wasteful number, since it uses less digits than its factorization.

157661272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19707665 (or 19707661 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 157661272 is about 12556.3239843515. The cubic root of 157661272 is about 540.2254111523.

The spelling of 157661272 in words is "one hundred fifty-seven million, six hundred sixty-one thousand, two hundred seventy-two".