36638521620 has 48 divisors (see below), whose sum is σ = 102604295808. Its totient is φ = 9768707200.

The previous prime is 36638521607. The next prime is 36638521631. The reversal of 36638521620 is 2612583663.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 356497 + ... + 447623.

It is an arithmetic number, because the mean of its divisors is an integer number (2137589496).

Almost surely, 2^36638521620 is an apocalyptic number.

36638521620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

36638521620 is an abundant number, since it is smaller than the sum of its proper divisors (65965774188).

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

36638521620 is a wasteful number, since it uses less digits than its factorization.

36638521620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97840 (or 97838 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 36638521620 in words is "thirty-six billion, six hundred thirty-eight million, five hundred twenty-one thousand, six hundred twenty".