26087870865 has 64 divisors (see below), whose sum is σ = 52397568000. Its totient is φ = 10806960384.

The previous prime is 26087870849. The next prime is 26087870917. The reversal of 26087870865 is 56807878062.

It is a happy number.

It is not a de Polignac number, because 26087870865 - 2⁴ = 26087870849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 238390 + ... + 330159.

It is an arithmetic number, because the mean of its divisors is an integer number (818712000).

Almost surely, 2^26087870865 is an apocalyptic number.

It is an amenable number.

26087870865 is an abundant number, since it is smaller than the sum of its proper divisors (26309697135).

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

26087870865 is a wasteful number, since it uses less digits than its factorization.

26087870865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568606.

The product of its (nonzero) digits is 9031680, while the sum is 57.

The spelling of 26087870865 in words is "twenty-six billion, eighty-seven million, eight hundred seventy thousand, eight hundred sixty-five".