15561056622 has 8 divisors (see below), whose sum is σ = 31122113256. Its totient is φ = 5187018872.

The previous prime is 15561056593. The next prime is 15561056627. The reversal of 15561056622 is 22665016551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

15561056622 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15561056627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1296754713 + ... + 1296754724.

It is an arithmetic number, because the mean of its divisors is an integer number (3890264157).

Almost surely, 2^15561056622 is an apocalyptic number.

15561056622 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

15561056622 is a wasteful number, since it uses less digits than its factorization.

15561056622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593509442.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 15561056622 in words is "fifteen billion, five hundred sixty-one million, fifty-six thousand, six hundred twenty-two".