157658801 has 2 divisors, whose sum is σ = 157658802. Its totient is φ = 157658800.

The previous prime is 157658791. The next prime is 157658807. The reversal of 157658801 is 108856751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143400625 + 14258176 = 11975^2 + 3776^2 .

It is an emirp because it is prime and its reverse (108856751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157658801 - 2²⁶ = 90549937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157658807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78829400 + 78829401.

It is an arithmetic number, because the mean of its divisors is an integer number (78829401).

Almost surely, 2^157658801 is an apocalyptic number.

It is an amenable number.

157658801 is a deficient number, since it is larger than the sum of its proper divisors (1).

157658801 is an equidigital number, since it uses as much as digits as its factorization.

157658801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 41.

The square root of 157658801 is about 12556.2255873332. The cubic root of 157658801 is about 540.2225888486. Note that the first 3 decimals are identical.

The spelling of 157658801 in words is "one hundred fifty-seven million, six hundred fifty-eight thousand, eight hundred one".