7886505636 has 135 divisors (see below), whose sum is σ = 21568601873. Its totient is φ = 2429732160.

The previous prime is 7886505619. The next prime is 7886505661. The reversal of 7886505636 is 6365056887.

The square root of 7886505636 is 88806.

It is a perfect power (a square), and thus also a powerful number.

7886505636 is a `hidden beast` number, since 78 + 8 + 6 + 5 + 0 + 563 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 380016036 + 7506489600 = 19494^2 + 86640^2 .

It is a super-2 number, since 2×7886505636² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 192353776 + ... + 192353816.

Almost surely, 2^7886505636 is an apocalyptic number.

7886505636 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

7886505636 is the 88806-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7886505636

7886505636 is an abundant number, since it is smaller than the sum of its proper divisors (13682096237).

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

7886505636 is an equidigital number, since it uses as much as digits as its factorization.

7886505636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The cubic root of 7886505636 is about 1990.4970548646.

The spelling of 7886505636 in words is "seven billion, eight hundred eighty-six million, five hundred five thousand, six hundred thirty-six".