26390477568 has 432 divisors, whose sum is σ = 89820358656. Its totient is φ = 6728417280.

The previous prime is 26390477521. The next prime is 26390477579. The reversal of 26390477568 is 86577409362.

It is a super-2 number, since 2×26390477568² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28164396 + ... + 28165332.

Almost surely, 2^26390477568 is an apocalyptic number.

26390477568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26390477568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44910179328).

26390477568 is an abundant number, since it is smaller than the sum of its proper divisors (63429881088).

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

26390477568 is a wasteful number, since it uses less digits than its factorization.

26390477568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 26390477568 in words is "twenty-six billion, three hundred ninety million, four hundred seventy-seven thousand, five hundred sixty-eight".