15561554854 has 8 divisors (see below), whose sum is σ = 23342872320. Its totient is φ = 7780597416.

The previous prime is 15561554851. The next prime is 15561554873. The reversal of 15561554854 is 45845516551.

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

It is a super-2 number, since 2×15561554854² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15561554798 and 15561554807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15561554851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90267 + ... + 198169.

It is an arithmetic number, because the mean of its divisors is an integer number (2917859040).

Almost surely, 2^15561554854 is an apocalyptic number.

15561554854 is a deficient number, since it is larger than the sum of its proper divisors (7781317466).

15561554854 is a wasteful number, since it uses less digits than its factorization.

15561554854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180014.

The product of its digits is 2400000, while the sum is 49.

The spelling of 15561554854 in words is "fifteen billion, five hundred sixty-one million, five hundred fifty-four thousand, eight hundred fifty-four".