7945238977 has 8 divisors (see below), whose sum is σ = 8558156264. Its totient is φ = 7332571008.

The previous prime is 7945238969. The next prime is 7945239037. The reversal of 7945238977 is 7798325497.

It can be written as a sum of positive squares in 4 ways, for example, as 211091841 + 7734147136 = 14529^2 + 87944^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7945238977 - 2³ = 7945238969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7945238377) 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 7 ways as a sum of consecutive naturals, for example, 6703 + ... + 126235.

It is an arithmetic number, because the mean of its divisors is an integer number (1069769533).

Almost surely, 2^7945238977 is an apocalyptic number.

It is an amenable number.

7945238977 is a deficient number, since it is larger than the sum of its proper divisors (612917287).

7945238977 is a wasteful number, since it uses less digits than its factorization.

7945238977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124659.

The product of its digits is 26671680, while the sum is 61.

The square root of 7945238977 is about 89136.0700109669. The cubic root of 7945238977 is about 1995.4261292437.

The spelling of 7945238977 in words is "seven billion, nine hundred forty-five million, two hundred thirty-eight thousand, nine hundred seventy-seven".