7778345051 has 2 divisors, whose sum is σ = 7778345052. Its totient is φ = 7778345050.

The previous prime is 7778345023. The next prime is 7778345093. The reversal of 7778345051 is 1505438777.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7778345051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7778344987 and 7778345005.

It is not a weakly prime, because it can be changed into another prime (7778345651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3889172525 + 3889172526.

It is an arithmetic number, because the mean of its divisors is an integer number (3889172526).

Almost surely, 2^7778345051 is an apocalyptic number.

7778345051 is a deficient number, since it is larger than the sum of its proper divisors (1).

7778345051 is an equidigital number, since it uses as much as digits as its factorization.

7778345051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 823200, while the sum is 47.

The square root of 7778345051 is about 88194.9264470468. The cubic root of 7778345051 is about 1981.3554853847.

The spelling of 7778345051 in words is "seven billion, seven hundred seventy-eight million, three hundred forty-five thousand, fifty-one".