6381001836 has 72 divisors (see below), whose sum is σ = 17770426128. Its totient is φ = 1914480000.

The previous prime is 6381001787. The next prime is 6381001871.

6381001836 is a `hidden beast` number, since 638 + 1 + 0 + 0 + 18 + 3 + 6 = 666.

6381001836 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6381001836.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39775 + ... + 119766.

It is an arithmetic number, because the mean of its divisors is an integer number (246811474).

Almost surely, 2^6381001836 is an apocalyptic number.

6381001836 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6381001836 is an abundant number, since it is smaller than the sum of its proper divisors (11389424292).

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

6381001836 is a wasteful number, since it uses less digits than its factorization.

6381001836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159663 (or 159658 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 6381001836 is about 79881.1732262365. The cubic root of 6381001836 is about 1854.7965945964.

It can be divided in two parts, 638100 and 1836, that added together give a palindrome (639936).

The spelling of 6381001836 in words is "six billion, three hundred eighty-one million, one thousand, eight hundred thirty-six".