157809441 has 8 divisors (see below), whose sum is σ = 215306080. Its totient is φ = 102759552.

The previous prime is 157809439. The next prime is 157809469. The reversal of 157809441 is 144908751.

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

It is not a de Polignac number, because 157809441 - 2¹ = 157809439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157809441.

It is not an unprimeable number, because it can be changed into a prime (157809401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611536 + ... + 611793.

It is an arithmetic number, because the mean of its divisors is an integer number (26913260).

Almost surely, 2^157809441 is an apocalyptic number.

It is an amenable number.

157809441 is a deficient number, since it is larger than the sum of its proper divisors (57496639).

157809441 is a wasteful number, since it uses less digits than its factorization.

157809441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223375.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 157809441 is about 12562.2227730605. Note that the first 3 decimals coincide. The cubic root of 157809441 is about 540.3945915644.

The spelling of 157809441 in words is "one hundred fifty-seven million, eight hundred nine thousand, four hundred forty-one".