5661611315412 has 24 divisors (see below), whose sum is σ = 14226613049376. Its totient is φ = 1742034250848.

The previous prime is 5661611315389. The next prime is 5661611315419. The reversal of 5661611315412 is 2145131161665.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661611315419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18146189958 + ... + 18146190269.

It is an arithmetic number, because the mean of its divisors is an integer number (592775543724).

Almost surely, 2^{5661611315412} is an apocalyptic number.

5661611315412 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

5661611315412 is an abundant number, since it is smaller than the sum of its proper divisors (8565001733964).

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

5661611315412 is a wasteful number, since it uses less digits than its factorization.

5661611315412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36292380247 (or 36292380245 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The spelling of 5661611315412 in words is "five trillion, six hundred sixty-one billion, six hundred eleven million, three hundred fifteen thousand, four hundred twelve".