157244649 has 8 divisors (see below), whose sum is σ = 209980320. Its totient is φ = 104669376.

The previous prime is 157244621. The next prime is 157244677. The reversal of 157244649 is 946442751.

It is an interprime number because it is at equal distance from previous prime (157244621) and next prime (157244677).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157244649 - 2⁹ = 157244137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157244649.

It is not an unprimeable number, because it can be changed into a prime (157644649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37792 + ... + 41745.

It is an arithmetic number, because the mean of its divisors is an integer number (26247540).

Almost surely, 2^157244649 is an apocalyptic number.

It is an amenable number.

157244649 is a deficient number, since it is larger than the sum of its proper divisors (52735671).

157244649 is an equidigital number, since it uses as much as digits as its factorization.

157244649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80199.

The product of its digits is 241920, while the sum is 42.

The square root of 157244649 is about 12539.7228438271. The cubic root of 157244649 is about 539.7491393089.

The spelling of 157244649 in words is "one hundred fifty-seven million, two hundred forty-four thousand, six hundred forty-nine".