6181536351816 has 128 divisors (see below), whose sum is σ = 19818221702400. Its totient is φ = 1748666534400.

The previous prime is 6181536351791. The next prime is 6181536351821.

6181536351816 is a `hidden beast` number, since 6 + 1 + 8 + 1 + 53 + 63 + 518 + 16 = 666.

6181536351816 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6181536351816² (a number of 26 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20086485 + ... + 20391908.

It is an arithmetic number, because the mean of its divisors is an integer number (154829857050).

Almost surely, 2^{6181536351816} is an apocalyptic number.

It is an amenable number.

6181536351816 is an abundant number, since it is smaller than the sum of its proper divisors (13636685350584).

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

6181536351816 is a wasteful number, since it uses less digits than its factorization.

6181536351816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40478516 (or 40478506 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 6181536351816 in words is "six trillion, one hundred eighty-one billion, five hundred thirty-six million, three hundred fifty-one thousand, eight hundred sixteen".