7381673778 has 8 divisors (see below), whose sum is σ = 14763347568. Its totient is φ = 2460557924.

The previous prime is 7381673773. The next prime is 7381673791. The reversal of 7381673778 is 8773761837.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

7381673778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (7381673773) 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, 615139476 + ... + 615139487.

It is an arithmetic number, because the mean of its divisors is an integer number (1845418446).

Almost surely, 2^7381673778 is an apocalyptic number.

7381673778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7381673778 is a wasteful number, since it uses less digits than its factorization.

7381673778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230278968.

The product of its digits is 8297856, while the sum is 57.

The square root of 7381673778 is about 85916.6676378920. The cubic root of 7381673778 is about 1947.0851720242.

The spelling of 7381673778 in words is "seven billion, three hundred eighty-one million, six hundred seventy-three thousand, seven hundred seventy-eight".