26491750740 has 288 divisors, whose sum is σ = 99146960640. Its totient is φ = 5575661568.

The previous prime is 26491750739. The next prime is 26491750759. The reversal of 26491750740 is 4705719462.

26491750740 is a `hidden beast` number, since 26 + 491 + 75 + 0 + 74 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7483891 + ... + 7487429.

It is an arithmetic number, because the mean of its divisors is an integer number (344260280).

Almost surely, 2^26491750740 is an apocalyptic number.

26491750740 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 26491750740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49573480320).

26491750740 is an abundant number, since it is smaller than the sum of its proper divisors (72655209900).

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

26491750740 is a wasteful number, since it uses less digits than its factorization.

26491750740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031 (or 4026 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 26491750740 in words is "twenty-six billion, four hundred ninety-one million, seven hundred fifty thousand, seven hundred forty".