7716915378 has 48 divisors (see below), whose sum is σ = 16810139736. Its totient is φ = 2558476800.

The previous prime is 7716915377. The next prime is 7716915389. The reversal of 7716915378 is 8735196177.

7716915378 is a `hidden beast` number, since 7 + 7 + 16 + 91 + 537 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7716392649 + 522729 = 87843^2 + 723^2 .

It is not an unprimeable number, because it can be changed into a prime (7716915377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2864200 + ... + 2866892.

Almost surely, 2^7716915378 is an apocalyptic number.

7716915378 is an abundant number, since it is smaller than the sum of its proper divisors (9093224358).

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

7716915378 is a wasteful number, since it uses less digits than its factorization.

7716915378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499 (or 3496 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 7716915378 is about 87845.9753090601. The cubic root of 7716915378 is about 1976.1257591302.

The spelling of 7716915378 in words is "seven billion, seven hundred sixteen million, nine hundred fifteen thousand, three hundred seventy-eight".