157740081 has 4 divisors (see below), whose sum is σ = 210320112. Its totient is φ = 105160052.

The previous prime is 157740047. The next prime is 157740091. The reversal of 157740081 is 180047751.

157740081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157740081 - 2¹⁸ = 157477937 is a prime.

It is a super-2 number, since 2×157740081² = 49763866307773122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157740041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26290011 + ... + 26290016.

It is an arithmetic number, because the mean of its divisors is an integer number (52580028).

Almost surely, 2^157740081 is an apocalyptic number.

It is an amenable number.

157740081 is a deficient number, since it is larger than the sum of its proper divisors (52580031).

157740081 is an equidigital number, since it uses as much as digits as its factorization.

157740081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52580030.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 157740081 is about 12559.4618117179. The cubic root of 157740081 is about 540.3154090151.

The spelling of 157740081 in words is "one hundred fifty-seven million, seven hundred forty thousand, eighty-one".