498638633478 has 16 divisors (see below), whose sum is σ = 1040637148416. Its totient is φ = 158986230920.

The previous prime is 498638633461. The next prime is 498638633489. The reversal of 498638633478 is 874336836894.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1806661578 + ... + 1806661853.

It is an arithmetic number, because the mean of its divisors is an integer number (65039821776).

Almost surely, 2^498638633478 is an apocalyptic number.

498638633478 is an abundant number, since it is smaller than the sum of its proper divisors (541998514938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

498638633478 is a wasteful number, since it uses less digits than its factorization.

498638633478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613323459.

The product of its digits is 501645312, while the sum is 69.

The spelling of 498638633478 in words is "four hundred ninety-eight billion, six hundred thirty-eight million, six hundred thirty-three thousand, four hundred seventy-eight".