6215151636 has 144 divisors (see below), whose sum is σ = 16963914240. Its totient is φ = 1912584960.

The previous prime is 6215151629. The next prime is 6215151641. The reversal of 6215151636 is 6361515126.

6215151636 is a `hidden beast` number, since 6 + 2 + 1 + 5 + 15 + 1 + 636 = 666.

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 6215151636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6271101 + ... + 6272091.

It is an arithmetic number, because the mean of its divisors is an integer number (117804960).

Almost surely, 2^6215151636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6215151636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8481957120).

6215151636 is an abundant number, since it is smaller than the sum of its proper divisors (10748762604).

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

6215151636 is a wasteful number, since it uses less digits than its factorization.

6215151636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1241 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 6215151636 is about 78836.2330150293. The cubic root of 6215151636 is about 1838.5858340788.

The spelling of 6215151636 in words is "six billion, two hundred fifteen million, one hundred fifty-one thousand, six hundred thirty-six".