7855284413 has 4 divisors (see below), whose sum is σ = 7885849980. Its totient is φ = 7824718848.

The previous prime is 7855284403. The next prime is 7855284421. The reversal of 7855284413 is 3144825587.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7692517849 + 162766564 = 87707^2 + 12758^2 .

It is a cyclic number.

It is not a de Polignac number, because 7855284413 - 2¹² = 7855280317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7855284403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15282398 + ... + 15282911.

It is an arithmetic number, because the mean of its divisors is an integer number (1971462495).

Almost surely, 2^7855284413 is an apocalyptic number.

It is an amenable number.

7855284413 is a deficient number, since it is larger than the sum of its proper divisors (30565567).

7855284413 is a wasteful number, since it uses less digits than its factorization.

7855284413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30565566.

The product of its digits is 1075200, while the sum is 47.

The square root of 7855284413 is about 88630.0423840585. The cubic root of 7855284413 is about 1987.8669106662.

The spelling of 7855284413 in words is "seven billion, eight hundred fifty-five million, two hundred eighty-four thousand, four hundred thirteen".