157694920219 has 4 divisors (see below), whose sum is σ = 159320641144. Its totient is φ = 156069199296.

The previous prime is 157694920213. The next prime is 157694920223. The reversal of 157694920219 is 912029496751.

It is a happy number.

157694920219 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157694920219 is a prime.

It is a super-2 number, since 2×157694920219² (a number of 23 digits) contains 22 as substring.

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 157694920219.

It is not an unprimeable number, because it can be changed into a prime (157694920213) 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, 812860317 + ... + 812860510.

It is an arithmetic number, because the mean of its divisors is an integer number (39830160286).

Almost surely, 2^157694920219 is an apocalyptic number.

157694920219 is a deficient number, since it is larger than the sum of its proper divisors (1625720925).

157694920219 is an equidigital number, since it uses as much as digits as its factorization.

157694920219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625720924.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 157694920219 in words is "one hundred fifty-seven billion, six hundred ninety-four million, nine hundred twenty thousand, two hundred nineteen".