7920264636 has 36 divisors (see below), whose sum is σ = 20891134992. Its totient is φ = 2525301504.

The previous prime is 7920264631. The next prime is 7920264641. The reversal of 7920264636 is 6364620297.

7920264636 is a `hidden beast` number, since 7 + 9 + 2 + 0 + 2 + 6 + 4 + 636 = 666.

It is an interprime number because it is at equal distance from previous prime (7920264631) and next prime (7920264641).

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 7920264591 and 7920264600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920264631) 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 11 ways as a sum of consecutive naturals, for example, 4781941 + ... + 4783596.

Almost surely, 2^7920264636 is an apocalyptic number.

It is an amenable number.

7920264636 is an abundant number, since it is smaller than the sum of its proper divisors (12970870356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7920264636 is a wasteful number, since it uses less digits than its factorization.

7920264636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9565570 (or 9565565 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The square root of 7920264636 is about 88995.8686456849. The cubic root of 7920264636 is about 1993.3331878341. Note that the first 3 decimals are identical.

The spelling of 7920264636 in words is "seven billion, nine hundred twenty million, two hundred sixty-four thousand, six hundred thirty-six".