42478517365 has 4 divisors (see below), whose sum is σ = 50974220844. Its totient is φ = 33982813888.

The previous prime is 42478517353. The next prime is 42478517377. The reversal of 42478517365 is 56371587424.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42478517353) and next prime (42478517377).

It can be written as a sum of positive squares in 2 ways, for example, as 15239655601 + 27238861764 = 123449^2 + 165042^2 .

It is a cyclic number.

It is not a de Polignac number, because 42478517365 - 2³³ = 33888582773 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 3 ways as a sum of consecutive naturals, for example, 4247851732 + ... + 4247851741.

It is an arithmetic number, because the mean of its divisors is an integer number (12743555211).

Almost surely, 2^42478517365 is an apocalyptic number.

It is an amenable number.

42478517365 is a deficient number, since it is larger than the sum of its proper divisors (8495703479).

42478517365 is an equidigital number, since it uses as much as digits as its factorization.

42478517365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8495703478.

The product of its digits is 5644800, while the sum is 52.

The spelling of 42478517365 in words is "forty-two billion, four hundred seventy-eight million, five hundred seventeen thousand, three hundred sixty-five".