26478276678 has 128 divisors (see below), whose sum is σ = 68782141440. Its totient is φ = 7393576320.

The previous prime is 26478276647. The next prime is 26478276691. The reversal of 26478276678 is 87667287462.

26478276678 is a `hidden beast` number, since 26 + 478 + 2 + 76 + 6 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 5426776 + ... + 5431652.

It is an arithmetic number, because the mean of its divisors is an integer number (537360480).

Almost surely, 2^26478276678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26478276678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34391070720).

26478276678 is an abundant number, since it is smaller than the sum of its proper divisors (42303864762).

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

26478276678 is a wasteful number, since it uses less digits than its factorization.

26478276678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5219 (or 5213 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 63.

The spelling of 26478276678 in words is "twenty-six billion, four hundred seventy-eight million, two hundred seventy-six thousand, six hundred seventy-eight".