6361551636 has 96 divisors (see below), whose sum is σ = 17036853120. Its totient is φ = 1829836800.

The previous prime is 6361551629. The next prime is 6361551641.

6361551636 is nontrivially palindromic in base 10.

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 31 ways as a sum of consecutive naturals, for example, 184360 + ... + 216128.

It is an arithmetic number, because the mean of its divisors is an integer number (177467220).

Almost surely, 2^6361551636 is an apocalyptic number.

6361551636 is a gapful number since it is divisible by the number (66) 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 6361551636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8518426560).

6361551636 is an abundant number, since it is smaller than the sum of its proper divisors (10675301484).

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

6361551636 is a wasteful number, since it uses less digits than its factorization.

6361551636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31865 (or 31863 counting only the distinct ones).

The product of its digits is 291600, while the sum is 42.

The square root of 6361551636 is about 79759.3357294304. The cubic root of 6361551636 is about 1852.9101153809.

The spelling of 6361551636 in words is "six billion, three hundred sixty-one million, five hundred fifty-one thousand, six hundred thirty-six".