26678918051690 has 16 divisors (see below), whose sum is σ = 48388633048800. Its totient is φ = 10590104874960.

The previous prime is 26678918051663. The next prime is 26678918051701. The reversal of 26678918051690 is 9615081987662.

It is a happy number.

It is a super-3 number, since 3×26678918051690³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 26678918051690.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10182791840 + ... + 10182794459.

It is an arithmetic number, because the mean of its divisors is an integer number (3024289565550).

Almost surely, 2^{26678918051690} is an apocalyptic number.

26678918051690 is a deficient number, since it is larger than the sum of its proper divisors (21709714997110).

26678918051690 is a wasteful number, since it uses less digits than its factorization.

26678918051690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20365586437.

The product of its (nonzero) digits is 78382080, while the sum is 68.

The spelling of 26678918051690 in words is "twenty-six trillion, six hundred seventy-eight billion, nine hundred eighteen million, fifty-one thousand, six hundred ninety".