4365978991 has 6 divisors (see below), whose sum is σ = 4798968776. Its totient is φ = 3969071700.

The previous prime is 4365978983. The next prime is 4365979001. The reversal of 4365978991 is 1998795634.

It is not a de Polignac number, because 4365978991 - 2³ = 4365978983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4365978901) 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 5 ways as a sum of consecutive naturals, for example, 18041115 + ... + 18041356.

Almost surely, 2^4365978991 is an apocalyptic number.

4365978991 is a deficient number, since it is larger than the sum of its proper divisors (432989785).

4365978991 is a wasteful number, since it uses less digits than its factorization.

4365978991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36082493 (or 36082482 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 61.

The square root of 4365978991 is about 66075.5551698206. Note that the first 3 decimals coincide. The cubic root of 4365978991 is about 1634.4082551553.

The spelling of 4365978991 in words is "four billion, three hundred sixty-five million, nine hundred seventy-eight thousand, nine hundred ninety-one".