26845797440 has 448 divisors, whose sum is σ = 82780558848. Its totient is φ = 8051097600.

The previous prime is 26845797431. The next prime is 26845797479. The reversal of 26845797440 is 4479754862.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79660952 + ... + 79661288.

Almost surely, 2^26845797440 is an apocalyptic number.

26845797440 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 26845797440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41390279424).

26845797440 is an abundant number, since it is smaller than the sum of its proper divisors (55934761408).

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

26845797440 is a wasteful number, since it uses less digits than its factorization.

26845797440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 26845797440 in words is "twenty-six billion, eight hundred forty-five million, seven hundred ninety-seven thousand, four hundred forty".