157680001 has 4 divisors (see below), whose sum is σ = 158218452. Its totient is φ = 157141552.

The previous prime is 157679953. The next prime is 157680007. The reversal of 157680001 is 100086751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100086751 = 131 ⋅764021.

It can be written as a sum of positive squares in 2 ways, for example, as 91680625 + 65999376 = 9575^2 + 8124^2 .

It is a cyclic number.

It is not a de Polignac number, because 157680001 - 2¹¹ = 157677953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157680007) 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, 268786 + ... + 269371.

It is an arithmetic number, because the mean of its divisors is an integer number (39554613).

Almost surely, 2^157680001 is an apocalyptic number.

It is an amenable number.

157680001 is a deficient number, since it is larger than the sum of its proper divisors (538451).

157680001 is an equidigital number, since it uses as much as digits as its factorization.

157680001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538450.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 157680001 is about 12557.0697616920. The cubic root of 157680001 is about 540.2468019077.

The spelling of 157680001 in words is "one hundred fifty-seven million, six hundred eighty thousand, one".