26870057856 has 128 divisors (see below), whose sum is σ = 79635520800. Its totient is φ = 8919244800.

The previous prime is 26870057839. The next prime is 26870057857. The reversal of 26870057856 is 65875007862.

26870057856 is a `hidden beast` number, since 2 + 68 + 7 + 0 + 0 + 578 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26870057857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 816766 + ... + 849026.

Almost surely, 2^26870057856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26870057856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39817760400).

26870057856 is an abundant number, since it is smaller than the sum of its proper divisors (52765462944).

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

26870057856 is a wasteful number, since it uses less digits than its factorization.

26870057856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32525 (or 32507 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 26870057856 in words is "twenty-six billion, eight hundred seventy million, fifty-seven thousand, eight hundred fifty-six".