26690144140 has 48 divisors (see below), whose sum is σ = 61831758240. Its totient is φ = 9596449280.

The previous prime is 26690144137. The next prime is 26690144179. The reversal of 26690144140 is 4144109662.

It is a self number, because there is not a number n which added to its sum of digits gives 26690144140.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 661987 + ... + 701146.

It is an arithmetic number, because the mean of its divisors is an integer number (1288161630).

Almost surely, 2^26690144140 is an apocalyptic number.

26690144140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26690144140 is an abundant number, since it is smaller than the sum of its proper divisors (35141614100).

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

26690144140 is a wasteful number, since it uses less digits than its factorization.

26690144140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363242 (or 1363240 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 26690144140 in words is "twenty-six billion, six hundred ninety million, one hundred forty-four thousand, one hundred forty".