157561772 has 12 divisors (see below), whose sum is σ = 276372936. Its totient is φ = 78598080.

The previous prime is 157561771. The next prime is 157561777. The reversal of 157561772 is 277165751.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (157561771) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 43754 + ... + 47217.

It is an arithmetic number, because the mean of its divisors is an integer number (23031078).

Almost surely, 2^157561772 is an apocalyptic number.

It is an amenable number.

157561772 is a deficient number, since it is larger than the sum of its proper divisors (118811164).

157561772 is a wasteful number, since it uses less digits than its factorization.

157561772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91408 (or 91406 counting only the distinct ones).

The product of its digits is 102900, while the sum is 41.

The square root of 157561772 is about 12552.3612121385. The cubic root of 157561772 is about 540.1117418506. Note that the first 3 decimals are identical.

The spelling of 157561772 in words is "one hundred fifty-seven million, five hundred sixty-one thousand, seven hundred seventy-two".