15493985885 has 8 divisors (see below), whose sum is σ = 21248894976. Its totient is φ = 10624447440.

The previous prime is 15493985851. The next prime is 15493985887. The reversal of 15493985885 is 58858939451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15493985885 - 2⁶ = 15493985821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15493985887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221342621 + ... + 221342690.

It is an arithmetic number, because the mean of its divisors is an integer number (2656111872).

Almost surely, 2^15493985885 is an apocalyptic number.

It is an amenable number.

15493985885 is a deficient number, since it is larger than the sum of its proper divisors (5754909091).

15493985885 is an equidigital number, since it uses as much as digits as its factorization.

15493985885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442685323.

The product of its digits is 62208000, while the sum is 65.

The spelling of 15493985885 in words is "fifteen billion, four hundred ninety-three million, nine hundred eighty-five thousand, eight hundred eighty-five".