6215815397376 has 720 divisors, whose sum is σ = 20225292087000. Its totient is φ = 1898799169536.

The previous prime is 6215815397293. The next prime is 6215815397387. The reversal of 6215815397376 is 6737935185126.

6215815397376 is a `hidden beast` number, since 6 + 2 + 15 + 81 + 539 + 7 + 3 + 7 + 6 = 666.

It is a super-2 number, since 2×6215815397376² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44718096315 + ... + 44718096453.

Almost surely, 2^{6215815397376} 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 6215815397376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10112646043500).

6215815397376 is an abundant number, since it is smaller than the sum of its proper divisors (14009476689624).

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

6215815397376 is an frugal number, since it uses more digits than its factorization.

6215815397376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 157 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 63.

The spelling of 6215815397376 in words is "six trillion, two hundred fifteen billion, eight hundred fifteen million, three hundred ninety-seven thousand, three hundred seventy-six".