15533112040 has 16 divisors (see below), whose sum is σ = 34949502180. Its totient is φ = 6213244800.

The previous prime is 15533111989. The next prime is 15533112071. The reversal of 15533112040 is 4021133551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15117686116 + 415425924 = 122954^2 + 20382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15533111996 and 15533112014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194163861 + ... + 194163940.

Almost surely, 2^15533112040 is an apocalyptic number.

15533112040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15533112040 is an abundant number, since it is smaller than the sum of its proper divisors (19416390140).

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

15533112040 is a wasteful number, since it uses less digits than its factorization.

15533112040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388327812 (or 388327808 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 15533112040 its reverse (4021133551), we get a palindrome (19554245591).

The spelling of 15533112040 in words is "fifteen billion, five hundred thirty-three million, one hundred twelve thousand, forty".