1636216956108 has 192 divisors, whose sum is σ = 4880522680320. Its totient is φ = 464363311104.

The previous prime is 1636216956083. The next prime is 1636216956113. The reversal of 1636216956108 is 8016596126361.

1636216956108 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 2 + 16 + 9 + 5 + 610 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 221316060 + ... + 221323452.

It is an arithmetic number, because the mean of its divisors is an integer number (25419388960).

Almost surely, 2^{1636216956108} is an apocalyptic number.

1636216956108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1636216956108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440261340160).

1636216956108 is an abundant number, since it is smaller than the sum of its proper divisors (3244305724212).

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

1636216956108 is a wasteful number, since it uses less digits than its factorization.

1636216956108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9333 (or 9325 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 1636216956108 in words is "one trillion, six hundred thirty-six billion, two hundred sixteen million, nine hundred fifty-six thousand, one hundred eight".