55060721040 has 160 divisors (see below), whose sum is σ = 186934285440. Its totient is φ = 13323644928.

The previous prime is 55060721029. The next prime is 55060721057. The reversal of 55060721040 is 4012706055.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55060720989 and 55060721007.

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, 34524 + ... + 333636.

It is an arithmetic number, because the mean of its divisors is an integer number (1168339284).

Almost surely, 2^55060721040 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 55060721040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93467142720).

55060721040 is an abundant number, since it is smaller than the sum of its proper divisors (131873564400).

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

55060721040 is a wasteful number, since it uses less digits than its factorization.

55060721040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299201 (or 299195 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 55060721040 in words is "fifty-five billion, sixty million, seven hundred twenty-one thousand, forty".