15533312540 has 12 divisors (see below), whose sum is σ = 32619956376. Its totient is φ = 6213325008.

The previous prime is 15533312527. The next prime is 15533312567. The reversal of 15533312540 is 4521333551.

It is a junction number, because it is equal to n+sod(n) for n = 15533312497 and 15533312506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388332794 + ... + 388332833.

It is an arithmetic number, because the mean of its divisors is an integer number (2718329698).

Almost surely, 2^15533312540 is an apocalyptic number.

15533312540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15533312540 is an abundant number, since it is smaller than the sum of its proper divisors (17086643836).

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

15533312540 is a wasteful number, since it uses less digits than its factorization.

15533312540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776665636 (or 776665634 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 15533312540 in words is "fifteen billion, five hundred thirty-three million, three hundred twelve thousand, five hundred forty".