15530446481 has 4 divisors (see below), whose sum is σ = 16942305264. Its totient is φ = 14118587700.

The previous prime is 15530446471. The next prime is 15530446483. The reversal of 15530446481 is 18464403551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15530446481 - 2³⁰ = 14456704657 is a prime.

It is a super-2 number, since 2×15530446481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15530446483) 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, 705929375 + ... + 705929396.

It is an arithmetic number, because the mean of its divisors is an integer number (4235576316).

Almost surely, 2^15530446481 is an apocalyptic number.

15530446481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15530446481 is a deficient number, since it is larger than the sum of its proper divisors (1411858783).

15530446481 is a wasteful number, since it uses less digits than its factorization.

15530446481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411858782.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 15530446481 in words is "fifteen billion, five hundred thirty million, four hundred forty-six thousand, four hundred eighty-one".