157689785 has 16 divisors (see below), whose sum is σ = 208481472. Its totient is φ = 113544000.

The previous prime is 157689781. The next prime is 157689799. The reversal of 157689785 is 587986751.

It is not a de Polignac number, because 157689785 - 2² = 157689781 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 157689785.

It is not an unprimeable number, because it can be changed into a prime (157689781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8639 + ... + 19748.

It is an arithmetic number, because the mean of its divisors is an integer number (13030092).

Almost surely, 2^157689785 is an apocalyptic number.

It is an amenable number.

157689785 is a deficient number, since it is larger than the sum of its proper divisors (50791687).

157689785 is a wasteful number, since it uses less digits than its factorization.

157689785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28504.

The product of its digits is 4233600, while the sum is 56.

The square root of 157689785 is about 12557.4593369837. The cubic root of 157689785 is about 540.2579757310.

The spelling of 157689785 in words is "one hundred fifty-seven million, six hundred eighty-nine thousand, seven hundred eighty-five".