18628783311478 has 16 divisors (see below), whose sum is σ = 28371719160720. Its totient is φ = 9171955852416.

The previous prime is 18628783311473. The next prime is 18628783311497. The reversal of 18628783311478 is 87411338782681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18628783311473) 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 7 ways as a sum of consecutive naturals, for example, 102974575 + ... + 103155322.

It is an arithmetic number, because the mean of its divisors is an integer number (1773232447545).

Almost surely, 2^{18628783311478} is an apocalyptic number.

18628783311478 is a deficient number, since it is larger than the sum of its proper divisors (9742935849242).

18628783311478 is a wasteful number, since it uses less digits than its factorization.

18628783311478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206130591.

The product of its digits is 86704128, while the sum is 67.

The spelling of 18628783311478 in words is "eighteen trillion, six hundred twenty-eight billion, seven hundred eighty-three million, three hundred eleven thousand, four hundred seventy-eight".