15554555056 has 10 divisors (see below), whose sum is σ = 30136950452. Its totient is φ = 7777277520.

The previous prime is 15554555053. The next prime is 15554555057. The reversal of 15554555056 is 65055545551.

It is a junction number, because it is equal to n+sod(n) for n = 15554554997 and 15554555015.

It is not an unprimeable number, because it can be changed into a prime (15554555053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486079830 + ... + 486079861.

Almost surely, 2^15554555056 is an apocalyptic number.

15554555056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15554555056 is a deficient number, since it is larger than the sum of its proper divisors (14582395396).

15554555056 is an equidigital number, since it uses as much as digits as its factorization.

15554555056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972159699 (or 972159693 counting only the distinct ones).

The product of its (nonzero) digits is 1875000, while the sum is 46.

The spelling of 15554555056 in words is "fifteen billion, five hundred fifty-four million, five hundred fifty-five thousand, fifty-six".