27641423778 has 8 divisors (see below), whose sum is σ = 55282847568. Its totient is φ = 9213807924.

The previous prime is 27641423743. The next prime is 27641423807. The reversal of 27641423778 is 87732414672.

It is a sphenic number, since it is the product of 3 distinct primes.

27641423778 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 27641423778.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2303451976 + ... + 2303451987.

It is an arithmetic number, because the mean of its divisors is an integer number (6910355946).

Almost surely, 2^27641423778 is an apocalyptic number.

27641423778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27641423778 is a wasteful number, since it uses less digits than its factorization.

27641423778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606903968.

The product of its digits is 3161088, while the sum is 51.

The spelling of 27641423778 in words is "twenty-seven billion, six hundred forty-one million, four hundred twenty-three thousand, seven hundred seventy-eight".