7867881215 has 4 divisors (see below), whose sum is σ = 9441457464. Its totient is φ = 6294304968.

The previous prime is 7867881211. The next prime is 7867881253. The reversal of 7867881215 is 5121887687.

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

It is a cyclic number.

It is not a de Polignac number, because 7867881215 - 2² = 7867881211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7867881211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786788117 + ... + 786788126.

It is an arithmetic number, because the mean of its divisors is an integer number (2360364366).

Almost surely, 2^7867881215 is an apocalyptic number.

7867881215 is a deficient number, since it is larger than the sum of its proper divisors (1573576249).

7867881215 is a wasteful number, since it uses less digits than its factorization.

7867881215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573576248.

The product of its digits is 1505280, while the sum is 53.

The square root of 7867881215 is about 88701.0778683100. The cubic root of 7867881215 is about 1988.9289300354.

The spelling of 7867881215 in words is "seven billion, eight hundred sixty-seven million, eight hundred eighty-one thousand, two hundred fifteen".