26159552640 has 896 divisors, whose sum is σ = 106758993600. Its totient is φ = 6073491456.

The previous prime is 26159552633. The next prime is 26159552641. The reversal of 26159552640 is 4625595162.

26159552640 is a `hidden beast` number, since 2 + 6 + 1 + 59 + 552 + 6 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (26159552641) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 115240207 + ... + 115240433.

Almost surely, 2^26159552640 is an apocalyptic number.

26159552640 is a gapful number since it is divisible by the number (20) 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 26159552640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53379496800).

26159552640 is an abundant number, since it is smaller than the sum of its proper divisors (80599440960).

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

26159552640 is a wasteful number, since it uses less digits than its factorization.

26159552640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 26159552640 in words is "twenty-six billion, one hundred fifty-nine million, five hundred fifty-two thousand, six hundred forty".