26890505344 has 64 divisors (see below), whose sum is σ = 58105819800. Its totient is φ = 12345671680.

The previous prime is 26890505333. The next prime is 26890505371. The reversal of 26890505344 is 44350509862.

It can be written as a sum of positive squares in 4 ways, for example, as 19624647744 + 7265857600 = 140088^2 + 85240^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×26890505344³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26890505294 and 26890505303.

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, 61489 + ... + 239920.

Almost surely, 2^26890505344 is an apocalyptic number.

It is an amenable number.

26890505344 is an abundant number, since it is smaller than the sum of its proper divisors (31215314456).

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

26890505344 is a wasteful number, since it uses less digits than its factorization.

26890505344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301481 (or 301469 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 26890505344 in words is "twenty-six billion, eight hundred ninety million, five hundred five thousand, three hundred forty-four".