3815804926864 has 240 divisors, whose sum is σ = 9200969731200. Its totient is φ = 1524029810688.

The previous prime is 3815804926861. The next prime is 3815804926907. The reversal of 3815804926864 is 4686294085183.

It is a junction number, because it is equal to n+sod(n) for n = 3815804926796 and 3815804926805.

It is not an unprimeable number, because it can be changed into a prime (3815804926861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 431696557 + ... + 431705395.

It is an arithmetic number, because the mean of its divisors is an integer number (38337373880).

Almost surely, 2^{3815804926864} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3815804926864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4600484865600).

3815804926864 is an abundant number, since it is smaller than the sum of its proper divisors (5385164804336).

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

3815804926864 is a wasteful number, since it uses less digits than its factorization.

3815804926864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9350 (or 9337 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 64.

The spelling of 3815804926864 in words is "three trillion, eight hundred fifteen billion, eight hundred four million, nine hundred twenty-six thousand, eight hundred sixty-four".