26830502478 has 128 divisors (see below), whose sum is σ = 67812111360. Its totient is φ = 7801073280.

The previous prime is 26830502411. The next prime is 26830502507. The reversal of 26830502478 is 87420503862.

26830502478 is a `hidden beast` number, since 26 + 83 + 0 + 502 + 47 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1330108 + ... + 1350128.

It is an arithmetic number, because the mean of its divisors is an integer number (529782120).

Almost surely, 2^26830502478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26830502478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33906055680).

26830502478 is an abundant number, since it is smaller than the sum of its proper divisors (40981608882).

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

26830502478 is a wasteful number, since it uses less digits than its factorization.

26830502478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20151 (or 20145 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 26830502478 in words is "twenty-six billion, eight hundred thirty million, five hundred two thousand, four hundred seventy-eight".