26785578270 has 128 divisors (see below), whose sum is σ = 72690048000. Its totient is φ = 6257269760.

The previous prime is 26785578269. The next prime is 26785578307. The reversal of 26785578270 is 7287558762.

It is a self number, because there is not a number n which added to its sum of digits gives 26785578270.

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, 5442871 + ... + 5447789.

It is an arithmetic number, because the mean of its divisors is an integer number (567891000).

Almost surely, 2^26785578270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26785578270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36345024000).

26785578270 is an abundant number, since it is smaller than the sum of its proper divisors (45904469730).

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

26785578270 is a wasteful number, since it uses less digits than its factorization.

26785578270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538.

The product of its (nonzero) digits is 13171200, while the sum is 57.

The spelling of 26785578270 in words is "twenty-six billion, seven hundred eighty-five million, five hundred seventy-eight thousand, two hundred seventy".