157516609 has 2 divisors, whose sum is σ = 157516610. Its totient is φ = 157516608.

The previous prime is 157516589. The next prime is 157516637. The reversal of 157516609 is 906615751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124992400 + 32524209 = 11180^2 + 5703^2 .

It is a cyclic number.

It is not a de Polignac number, because 157516609 - 2⁹ = 157516097 is a prime.

It is a super-2 number, since 2×157516609² = 49622964221717762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157516649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78758304 + 78758305.

It is an arithmetic number, because the mean of its divisors is an integer number (78758305).

Almost surely, 2^157516609 is an apocalyptic number.

It is an amenable number.

157516609 is a deficient number, since it is larger than the sum of its proper divisors (1).

157516609 is an equidigital number, since it uses as much as digits as its factorization.

157516609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 157516609 is about 12550.5620989659. The cubic root of 157516609 is about 540.0601316211.

The spelling of 157516609 in words is "one hundred fifty-seven million, five hundred sixteen thousand, six hundred nine".