15551015552 has 32 divisors (see below), whose sum is σ = 31031234580. Its totient is φ = 7762784256.

The previous prime is 15551015533. The next prime is 15551015561. The reversal of 15551015552 is 25551015551.

15551015552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10978010176 + 4573005376 = 104776^2 + 67624^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20633 + ... + 177560.

Almost surely, 2^15551015552 is an apocalyptic number.

It is an amenable number.

15551015552 is a deficient number, since it is larger than the sum of its proper divisors (15480219028).

15551015552 is an equidigital number, since it uses as much as digits as its factorization.

15551015552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198820 (or 198808 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 35.

Subtracting 15551015552 from its reverse (25551015551), we obtain a palindrome (9999999999).

The spelling of 15551015552 in words is "fifteen billion, five hundred fifty-one million, fifteen thousand, five hundred fifty-two".