15642422485 has 8 divisors (see below), whose sum is σ = 18771585336.
Its totient is φ = 12513485760.
The previous prime is 15642422479. The next prime is 15642422507. The reversal of 15642422485 is 58422424651.
It can be written as a sum of positive squares in 4 ways, for example, as 2132777124 + 13509645361 = 46182^2 + 116231^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 15642422485 - 219 = 15641898197 is a prime.
It is a Duffinian number.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209347 + ... + 274063.
It is an arithmetic number, because the mean of its divisors is an integer number (2346448167).
Almost surely, 215642422485 is an apocalyptic number.
It is an amenable number.
15642422485 is a deficient number, since it is larger than the sum of its proper divisors (3129162851).
15642422485 is an equidigital number, since it uses as much as digits as its factorization.
15642422485 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 113063.
The product of its digits is 614400, while the sum is 43.
The spelling of 15642422485 in words is "fifteen billion, six hundred forty-two million, four hundred twenty-two thousand, four hundred eighty-five".