7770000078 has 24 divisors (see below), whose sum is σ = 16848926328. Its totient is φ = 2587857552.

The previous prime is 7770000071. The next prime is 7770000113. The reversal of 7770000078 is 8700000777.

It is a junction number, because it is equal to n+sod(n) for n = 7769999997 and 7770000051.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7770000071) 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 11 ways as a sum of consecutive naturals, for example, 156100 + ... + 199767.

It is an arithmetic number, because the mean of its divisors is an integer number (702038597).

Almost surely, 2^7770000078 is an apocalyptic number.

7770000078 is an abundant number, since it is smaller than the sum of its proper divisors (9078926250).

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

7770000078 is a wasteful number, since it uses less digits than its factorization.

7770000078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357088 (or 357085 counting only the distinct ones).

The product of its (nonzero) digits is 19208, while the sum is 36.

The square root of 7770000078 is about 88147.6039265958. The cubic root of 7770000078 is about 1980.6466681752.

The spelling of 7770000078 in words is "seven billion, seven hundred seventy million, seventy-eight", and thus it is an aban number.