7997778952 has 8 divisors (see below), whose sum is σ = 14995835550. Its totient is φ = 3998889472.

The previous prime is 7997778839. The next prime is 7997778953. The reversal of 7997778952 is 2598777997.

It can be written as a sum of positive squares in only one way, i.e., 6321204036 + 1676574916 = 79506^2 + 40946^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (7997778953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499861177 + ... + 499861192.

Almost surely, 2^7997778952 is an apocalyptic number.

It is an amenable number.

7997778952 is a deficient number, since it is larger than the sum of its proper divisors (6998056598).

7997778952 is a wasteful number, since it uses less digits than its factorization.

7997778952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999722375 (or 999722371 counting only the distinct ones).

The product of its digits is 140026320, while the sum is 70.

The square root of 7997778952 is about 89430.3022023296. The cubic root of 7997778952 is about 1999.8148955354.

The spelling of 7997778952 in words is "seven billion, nine hundred ninety-seven million, seven hundred seventy-eight thousand, nine hundred fifty-two".