55720910880 has 1152 divisors, whose sum is σ = 228378528000. Its totient is φ = 12791955456.

The previous prime is 55720910837. The next prime is 55720910893. The reversal of 55720910880 is 8801902755.

It is a happy number.

55720910880 is a `hidden beast` number, since 557 + 2 + 0 + 9 + 10 + 8 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1921410706 + ... + 1921410734.

It is an arithmetic number, because the mean of its divisors is an integer number (198245250).

Almost surely, 2^55720910880 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 55720910880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114189264000).

55720910880 is an abundant number, since it is smaller than the sum of its proper divisors (172657617120).

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

55720910880 is a wasteful number, since it uses less digits than its factorization.

55720910880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 55720910880 in words is "fifty-five billion, seven hundred twenty million, nine hundred ten thousand, eight hundred eighty".