7678428577 has 4 divisors (see below), whose sum is σ = 7695013120. Its totient is φ = 7661844036.

The previous prime is 7678428547. The next prime is 7678428581. The reversal of 7678428577 is 7758248767.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7758248767 = 1277 ⋅6075371.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7678428577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7678428547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8291577 + ... + 8292502.

It is an arithmetic number, because the mean of its divisors is an integer number (1923753280).

Almost surely, 2^7678428577 is an apocalyptic number.

It is an amenable number.

7678428577 is a deficient number, since it is larger than the sum of its proper divisors (16584543).

7678428577 is a wasteful number, since it uses less digits than its factorization.

7678428577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16584542.

The product of its digits is 36879360, while the sum is 61.

The square root of 7678428577 is about 87626.6430773198. The cubic root of 7678428577 is about 1972.8350856196.

The spelling of 7678428577 in words is "seven billion, six hundred seventy-eight million, four hundred twenty-eight thousand, five hundred seventy-seven".