15501440505 has 32 divisors (see below), whose sum is σ = 25124327424. Its totient is φ = 8160546816.

The previous prime is 15501440447. The next prime is 15501440533. The reversal of 15501440505 is 50504410551.

It is not a de Polignac number, because 15501440505 - 2¹⁵ = 15501407737 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 543357 + ... + 571173.

It is an arithmetic number, because the mean of its divisors is an integer number (785135232).

Almost surely, 2^15501440505 is an apocalyptic number.

15501440505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15501440505 is a deficient number, since it is larger than the sum of its proper divisors (9622886919).

15501440505 is a wasteful number, since it uses less digits than its factorization.

15501440505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28305.

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 15501440505 in words is "fifteen billion, five hundred one million, four hundred forty thousand, five hundred five".