157685780019 has 4 divisors (see below), whose sum is σ = 210247706696. Its totient is φ = 105123853344.

The previous prime is 157685780011. The next prime is 157685780051. The reversal of 157685780019 is 910087586751.

157685780019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 157685780019 - 2³ = 157685780011 is a prime.

It is a super-2 number, since 2×157685780019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157685780011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26280963334 + ... + 26280963339.

It is an arithmetic number, because the mean of its divisors is an integer number (52561926674).

Almost surely, 2^157685780019 is an apocalyptic number.

157685780019 is a deficient number, since it is larger than the sum of its proper divisors (52561926677).

157685780019 is an equidigital number, since it uses as much as digits as its factorization.

157685780019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52561926676.

The product of its (nonzero) digits is 4233600, while the sum is 57.

The spelling of 157685780019 in words is "one hundred fifty-seven billion, six hundred eighty-five million, seven hundred eighty thousand, nineteen".