6378778736 has 40 divisors (see below), whose sum is σ = 13917347328. Its totient is φ = 2805912000.

The previous prime is 6378778733. The next prime is 6378778739.

6378778736 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (6378778733) and next prime (6378778739).

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6378778733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579110 + ... + 590021.

Almost surely, 2^6378778736 is an apocalyptic number.

It is an amenable number.

6378778736 is an abundant number, since it is smaller than the sum of its proper divisors (7538568592).

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

6378778736 is a wasteful number, since it uses less digits than its factorization.

6378778736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169181 (or 1169175 counting only the distinct ones).

The product of its digits is 49787136, while the sum is 62.

The square root of 6378778736 is about 79867.2569705508. The cubic root of 6378778736 is about 1854.5811698422.

The spelling of 6378778736 in words is "six billion, three hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred thirty-six".