22155551045550 has 240 divisors, whose sum is σ = 66310694437680. Its totient is φ = 5452380034560.

The previous prime is 22155551045549. The next prime is 22155551045567. The reversal of 22155551045550 is 5554015555122.

22155551045550 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 5 + 5 + 51 + 0 + 45 + 550 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 22155551045496 and 22155551045505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 232086129 + ... + 232181571.

It is an arithmetic number, because the mean of its divisors is an integer number (276294560157).

Almost surely, 2^{22155551045550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22155551045550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33155347218840).

22155551045550 is an abundant number, since it is smaller than the sum of its proper divisors (44155143392130).

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

22155551045550 is a wasteful number, since it uses less digits than its factorization.

22155551045550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99889 (or 99875 counting only the distinct ones).

The product of its (nonzero) digits is 1250000, while the sum is 45.

The spelling of 22155551045550 in words is "twenty-two trillion, one hundred fifty-five billion, five hundred fifty-one million, forty-five thousand, five hundred fifty".