157680733 has 4 divisors (see below), whose sum is σ = 180206560. Its totient is φ = 135154908.

The previous prime is 157680701. The next prime is 157680739. The reversal of 157680733 is 337086751.

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, and also an emirpimes, since its reverse is a distinct semiprime: 337086751 = 109 ⋅3092539.

It is not a de Polignac number, because 157680733 - 2⁵ = 157680701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157680739) 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, 11262903 + ... + 11262916.

It is an arithmetic number, because the mean of its divisors is an integer number (45051640).

Almost surely, 2^157680733 is an apocalyptic number.

It is an amenable number.

157680733 is a deficient number, since it is larger than the sum of its proper divisors (22525827).

157680733 is an equidigital number, since it uses as much as digits as its factorization.

157680733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22525826.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 157680733 is about 12557.0989085855. The cubic root of 157680733 is about 540.2476379047.

The spelling of 157680733 in words is "one hundred fifty-seven million, six hundred eighty thousand, seven hundred thirty-three".