7873878749 has 16 divisors (see below), whose sum is σ = 9057583680. Its totient is φ = 6769474560.

The previous prime is 7873878739. The next prime is 7873878751. The reversal of 7873878749 is 9478783787.

It is a cyclic number.

It is not a de Polignac number, because 7873878749 - 2²⁴ = 7857101533 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 (7873878739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87947 + ... + 153239.

It is an arithmetic number, because the mean of its divisors is an integer number (566098980).

Almost surely, 2^7873878749 is an apocalyptic number.

It is an amenable number.

7873878749 is a deficient number, since it is larger than the sum of its proper divisors (1183704931).

7873878749 is a wasteful number, since it uses less digits than its factorization.

7873878749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65900.

The product of its digits is 132765696, while the sum is 68.

The square root of 7873878749 is about 88734.8789879155. The cubic root of 7873878749 is about 1989.4341757231.

The spelling of 7873878749 in words is "seven billion, eight hundred seventy-three million, eight hundred seventy-eight thousand, seven hundred forty-nine".