27400722515556 has 96 divisors (see below), whose sum is σ = 70780157736960. Its totient is φ = 8195451416064.

The previous prime is 27400722515501. The next prime is 27400722515557. The reversal of 27400722515556 is 65551522700472.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27400722515499 and 27400722515508.

It is not an unprimeable number, because it can be changed into a prime (27400722515557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3949885 + ... + 8390651.

It is an arithmetic number, because the mean of its divisors is an integer number (737293309760).

Almost surely, 2^{27400722515556} is an apocalyptic number.

27400722515556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27400722515556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35390078868480).

27400722515556 is an abundant number, since it is smaller than the sum of its proper divisors (43379435221404).

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

27400722515556 is a wasteful number, since it uses less digits than its factorization.

27400722515556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441893 (or 4441891 counting only the distinct ones).

The product of its (nonzero) digits is 5880000, while the sum is 51.

The spelling of 27400722515556 in words is "twenty-seven trillion, four hundred billion, seven hundred twenty-two million, five hundred fifteen thousand, five hundred fifty-six".