15565413552 has 40 divisors (see below), whose sum is σ = 43303780464. Its totient is φ = 4789357824.

The previous prime is 15565413551. The next prime is 15565413569. The reversal of 15565413552 is 25531456551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15565413551) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12471663 + ... + 12472910.

Almost surely, 2^15565413552 is an apocalyptic number.

15565413552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15565413552 is an abundant number, since it is smaller than the sum of its proper divisors (27738366912).

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

15565413552 is a wasteful number, since it uses less digits than its factorization.

15565413552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24944597 (or 24944591 counting only the distinct ones).

The product of its digits is 450000, while the sum is 42.

The spelling of 15565413552 in words is "fifteen billion, five hundred sixty-five million, four hundred thirteen thousand, five hundred fifty-two".