6161612720 has 20 divisors (see below), whose sum is σ = 14325749760. Its totient is φ = 2464645056.

The previous prime is 6161612707. The next prime is 6161612729. The reversal of 6161612720 is 272161616.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×6161612720² = 75930942622531596800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6161612729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38510000 + ... + 38510159.

It is an arithmetic number, because the mean of its divisors is an integer number (716287488).

Almost surely, 2^6161612720 is an apocalyptic number.

It is an amenable number.

6161612720 is an abundant number, since it is smaller than the sum of its proper divisors (8164137040).

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

6161612720 is a wasteful number, since it uses less digits than its factorization.

6161612720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77020172 (or 77020166 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 6161612720 is about 78495.9407867693. The cubic root of 6161612720 is about 1833.2912513389.

The spelling of 6161612720 in words is "six billion, one hundred sixty-one million, six hundred twelve thousand, seven hundred twenty".