55610274440 has 128 divisors (see below), whose sum is σ = 146106720000. Its totient is φ = 19041490944.

The previous prime is 55610274439. The next prime is 55610274457. The reversal of 55610274440 is 4447201655.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55610274394 and 55610274403.

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, 12743699 + ... + 12748061.

It is an arithmetic number, because the mean of its divisors is an integer number (1141458750).

Almost surely, 2^55610274440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55610274440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73053360000).

55610274440 is an abundant number, since it is smaller than the sum of its proper divisors (90496445560).

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

55610274440 is a wasteful number, since it uses less digits than its factorization.

55610274440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324 (or 5306 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 38.

The spelling of 55610274440 in words is "fifty-five billion, six hundred ten million, two hundred seventy-four thousand, four hundred forty".