27726680454 has 64 divisors (see below), whose sum is σ = 62360312832. Its totient is φ = 8144582400.

The previous prime is 27726680447. The next prime is 27726680467. The reversal of 27726680454 is 45408662772.

It is a super-2 number, since 2×27726680454² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27726680397 and 27726680406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 640834 + ... + 682730.

It is an arithmetic number, because the mean of its divisors is an integer number (974379888).

Almost surely, 2^27726680454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27726680454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31180156416).

27726680454 is an abundant number, since it is smaller than the sum of its proper divisors (34633632378).

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

27726680454 is a wasteful number, since it uses less digits than its factorization.

27726680454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42221.

The product of its (nonzero) digits is 4515840, while the sum is 51.

The spelling of 27726680454 in words is "twenty-seven billion, seven hundred twenty-six million, six hundred eighty thousand, four hundred fifty-four".