7786378492 has 24 divisors (see below), whose sum is σ = 13694127552. Its totient is φ = 3873811200.

The previous prime is 7786378477. The next prime is 7786378493. The reversal of 7786378492 is 2948736877.

It is a self number, because there is not a number n which added to its sum of digits gives 7786378492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7786378493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850813 + ... + 859915.

It is an arithmetic number, because the mean of its divisors is an integer number (570588648).

Almost surely, 2^7786378492 is an apocalyptic number.

It is an amenable number.

7786378492 is a deficient number, since it is larger than the sum of its proper divisors (5907749060).

7786378492 is a wasteful number, since it uses less digits than its factorization.

7786378492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10149 (or 10147 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 61.

The square root of 7786378492 is about 88240.4583623635. The cubic root of 7786378492 is about 1982.0373624731.

The spelling of 7786378492 in words is "seven billion, seven hundred eighty-six million, three hundred seventy-eight thousand, four hundred ninety-two".