26861587740 has 240 divisors, whose sum is σ = 92107062432. Its totient is φ = 6513053184.

The previous prime is 26861587667. The next prime is 26861587769. The reversal of 26861587740 is 4778516862.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1401502 + ... + 1420538.

Almost surely, 2^26861587740 is an apocalyptic number.

26861587740 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 26861587740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46053531216).

26861587740 is an abundant number, since it is smaller than the sum of its proper divisors (65245474692).

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

26861587740 is a wasteful number, since it uses less digits than its factorization.

26861587740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19138 (or 19127 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 26861587740 in words is "twenty-six billion, eight hundred sixty-one million, five hundred eighty-seven thousand, seven hundred forty".