39478821795 has 128 divisors (see below), whose sum is σ = 85096396800. Its totient is φ = 16952426496.

The previous prime is 39478821793. The next prime is 39478821797. The reversal of 39478821795 is 59712887493.

39478821795 is a `hidden beast` number, since 394 + 78 + 8 + 2 + 179 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (39478821793) and next prime (39478821797).

It is not a de Polignac number, because 39478821795 - 2¹ = 39478821793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (39478821793) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9267376 + ... + 9271634.

It is an arithmetic number, because the mean of its divisors is an integer number (664815600).

Almost surely, 2^39478821795 is an apocalyptic number.

39478821795 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

39478821795 is an abundant number, since it is smaller than the sum of its proper divisors (45617575005).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39478821795 is a wasteful number, since it uses less digits than its factorization.

39478821795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874 (or 4868 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The spelling of 39478821795 in words is "thirty-nine billion, four hundred seventy-eight million, eight hundred twenty-one thousand, seven hundred ninety-five".