19478401159 has 12 divisors (see below), whose sum is σ = 23086071144. Its totient is φ = 16380755664.

The previous prime is 19478401153. The next prime is 19478401177. The reversal of 19478401159 is 95110487491.

It is not a de Polignac number, because 19478401159 - 2⁷ = 19478401031 is a prime.

It is a super-2 number, since 2×19478401159² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19478401153) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3747577 + ... + 3752770.

It is an arithmetic number, because the mean of its divisors is an integer number (1923839262).

Almost surely, 2^19478401159 is an apocalyptic number.

19478401159 is a deficient number, since it is larger than the sum of its proper divisors (3607669985).

19478401159 is an equidigital number, since it uses as much as digits as its factorization.

19478401159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7500414 (or 7500407 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 49.

The spelling of 19478401159 in words is "nineteen billion, four hundred seventy-eight million, four hundred one thousand, one hundred fifty-nine".