616661049186 has 128 divisors (see below), whose sum is σ = 1775362713600. Its totient is φ = 154076074560.

The previous prime is 616661049163. The next prime is 616661049187. The reversal of 616661049186 is 681940166616.

It is a super-2 number, since 2×616661049186² (a number of 24 digits) contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (616661049187) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3209020 + ... + 3395751.

It is an arithmetic number, because the mean of its divisors is an integer number (13870021200).

Almost surely, 2^616661049186 is an apocalyptic number.

616661049186 is an abundant number, since it is smaller than the sum of its proper divisors (1158701664414).

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

616661049186 is a wasteful number, since it uses less digits than its factorization.

616661049186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6604821 (or 6604815 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 616661049186 in words is "six hundred sixteen billion, six hundred sixty-one million, forty-nine thousand, one hundred eighty-six".