19157772463 has 4 divisors (see below), whose sum is σ = 19625035248. Its totient is φ = 18690509680.

The previous prime is 19157772449. The next prime is 19157772503. The reversal of 19157772463 is 36427775191.

It is a happy number.

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-19157772463 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 19157772463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19157772443) 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, 233631331 + ... + 233631412.

It is an arithmetic number, because the mean of its divisors is an integer number (4906258812).

Almost surely, 2^19157772463 is an apocalyptic number.

19157772463 is a deficient number, since it is larger than the sum of its proper divisors (467262785).

19157772463 is an equidigital number, since it uses as much as digits as its factorization.

19157772463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467262784.

The product of its digits is 2222640, while the sum is 52.

The spelling of 19157772463 in words is "nineteen billion, one hundred fifty-seven million, seven hundred seventy-two thousand, four hundred sixty-three".