7678451953 has 2 divisors, whose sum is σ = 7678451954. Its totient is φ = 7678451952.

The previous prime is 7678451933. The next prime is 7678451983. The reversal of 7678451953 is 3591548767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4530905344 + 3147546609 = 67312^2 + 56103^2 .

It is an emirp because it is prime and its reverse (3591548767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7678451953 - 2⁹ = 7678451441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7678451894 and 7678451903.

It is not a weakly prime, because it can be changed into another prime (7678451923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3839225976 + 3839225977.

It is an arithmetic number, because the mean of its divisors is an integer number (3839225977).

Almost surely, 2^7678451953 is an apocalyptic number.

It is an amenable number.

7678451953 is a deficient number, since it is larger than the sum of its proper divisors (1).

7678451953 is an equidigital number, since it uses as much as digits as its factorization.

7678451953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 55.

The square root of 7678451953 is about 87626.7764613078. The cubic root of 7678451953 is about 1972.8370876328.

The spelling of 7678451953 in words is "seven billion, six hundred seventy-eight million, four hundred fifty-one thousand, nine hundred fifty-three".