157817418 has 32 divisors (see below), whose sum is σ = 345546432. Its totient is φ = 47654400.

The previous prime is 157817383. The next prime is 157817423. The reversal of 157817418 is 814718751.

It is a self number, because there is not a number n which added to its sum of digits gives 157817418.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 15258 + ... + 23418.

It is an arithmetic number, because the mean of its divisors is an integer number (10798326).

Almost surely, 2^157817418 is an apocalyptic number.

157817418 is an abundant number, since it is smaller than the sum of its proper divisors (187729014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157817418 is a wasteful number, since it uses less digits than its factorization.

157817418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8470.

The product of its digits is 62720, while the sum is 42.

The square root of 157817418 is about 12562.5402685922. The cubic root of 157817418 is about 540.4036967548.

The spelling of 157817418 in words is "one hundred fifty-seven million, eight hundred seventeen thousand, four hundred eighteen".