55809483940 has 288 divisors, whose sum is σ = 153055889280. Its totient is φ = 16937496576.

The previous prime is 55809483937. The next prime is 55809484001. The reversal of 55809483940 is 4938490855.

It is a super-2 number, since 2×55809483940² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 49696219 + ... + 49697341.

It is an arithmetic number, because the mean of its divisors is an integer number (531444060).

Almost surely, 2^55809483940 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 55809483940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76527944640).

55809483940 is an abundant number, since it is smaller than the sum of its proper divisors (97246405340).

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

55809483940 is a wasteful number, since it uses less digits than its factorization.

55809483940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 55809483940 in words is "fifty-five billion, eight hundred nine million, four hundred eighty-three thousand, nine hundred forty".