18128855652 has 12 divisors (see below), whose sum is σ = 42300663216. Its totient is φ = 6042951880.

The previous prime is 18128855639. The next prime is 18128855659. The reversal of 18128855652 is 25655882181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 18128855595 and 18128855604.

It is not an unprimeable number, because it can be changed into a prime (18128855659) 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, 755368974 + ... + 755368997.

It is an arithmetic number, because the mean of its divisors is an integer number (3525055268).

Almost surely, 2^18128855652 is an apocalyptic number.

18128855652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18128855652 is an abundant number, since it is smaller than the sum of its proper divisors (24171807564).

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

18128855652 is a wasteful number, since it uses less digits than its factorization.

18128855652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510737978 (or 1510737976 counting only the distinct ones).

The product of its digits is 1536000, while the sum is 51.

The spelling of 18128855652 in words is "eighteen billion, one hundred twenty-eight million, eight hundred fifty-five thousand, six hundred fifty-two".