6621151615848 has 1024 divisors, whose sum is σ = 24908894208000. Its totient is φ = 1590979864320.

The previous prime is 6621151615843. The next prime is 6621151615877. The reversal of 6621151615848 is 8485161511266.

It is a happy number.

6621151615848 is a `hidden beast` number, since 6 + 6 + 2 + 1 + 1 + 51 + 6 + 1 + 584 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 6621151615794 and 6621151615803.

It is not an unprimeable number, because it can be changed into a prime (6621151615843) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1644187611 + ... + 1644191637.

It is an arithmetic number, because the mean of its divisors is an integer number (24325092000).

Almost surely, 2^{6621151615848} 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 6621151615848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12454447104000).

6621151615848 is an abundant number, since it is smaller than the sum of its proper divisors (18287742592152).

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

6621151615848 is a wasteful number, since it uses less digits than its factorization.

6621151615848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144 (or 4112 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The spelling of 6621151615848 in words is "six trillion, six hundred twenty-one billion, one hundred fifty-one million, six hundred fifteen thousand, eight hundred forty-eight".