15561105622 has 4 divisors (see below), whose sum is σ = 23341658436. Its totient is φ = 7780552810.

The previous prime is 15561105541. The next prime is 15561105661. The reversal of 15561105622 is 22650116551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22650116551 = 31 ⋅730648921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3890276404 + ... + 3890276407.

It is an arithmetic number, because the mean of its divisors is an integer number (5835414609).

Almost surely, 2^15561105622 is an apocalyptic number.

15561105622 is a deficient number, since it is larger than the sum of its proper divisors (7780552814).

15561105622 is an equidigital number, since it uses as much as digits as its factorization.

15561105622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780552813.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 15561105622 in words is "fifteen billion, five hundred sixty-one million, one hundred five thousand, six hundred twenty-two".