157636481 has 2 divisors, whose sum is σ = 157636482. Its totient is φ = 157636480.

The previous prime is 157636471. The next prime is 157636511. The reversal of 157636481 is 184636751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100180081 + 57456400 = 10009^2 + 7580^2 .

It is a cyclic number.

It is not a de Polignac number, because 157636481 - 2²⁶ = 90527617 is a prime.

It is a super-2 number, since 2×157636481² = 49698520284126722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157636441) 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 as a sum of consecutive naturals, namely, 78818240 + 78818241.

It is an arithmetic number, because the mean of its divisors is an integer number (78818241).

Almost surely, 2^157636481 is an apocalyptic number.

It is an amenable number.

157636481 is a deficient number, since it is larger than the sum of its proper divisors (1).

157636481 is an equidigital number, since it uses as much as digits as its factorization.

157636481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 157636481 is about 12555.3367537474. The cubic root of 157636481 is about 540.1970942634.

The spelling of 157636481 in words is "one hundred fifty-seven million, six hundred thirty-six thousand, four hundred eighty-one".