47878215815 has 8 divisors (see below), whose sum is σ = 57554482128. Its totient is φ = 38235490560.

The previous prime is 47878215799. The next prime is 47878215823. The reversal of 47878215815 is 51851287874.

It is a happy number.

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

It is not a de Polignac number, because 47878215815 - 2⁴ = 47878215799 is a prime.

It is a super-2 number, since 2×47878215815² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8382122 + ... + 8387831.

It is an arithmetic number, because the mean of its divisors is an integer number (7194310266).

Almost surely, 2^47878215815 is an apocalyptic number.

47878215815 is a deficient number, since it is larger than the sum of its proper divisors (9676266313).

47878215815 is a wasteful number, since it uses less digits than its factorization.

47878215815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16770529.

The product of its digits is 5017600, while the sum is 56.

The spelling of 47878215815 in words is "forty-seven billion, eight hundred seventy-eight million, two hundred fifteen thousand, eight hundred fifteen".