5661061161072 has 80 divisors (see below), whose sum is σ = 14636252044320. Its totient is φ = 1885492740096.

The previous prime is 5661061161071. The next prime is 5661061161101. The reversal of 5661061161072 is 2701611601665.

It is a happy number.

It is a super-2 number, since 2×5661061161072² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661061161071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460654704 + ... + 460666992.

It is an arithmetic number, because the mean of its divisors is an integer number (182953150554).

Almost surely, 2^{5661061161072} is an apocalyptic number.

It is an amenable number.

5661061161072 is an abundant number, since it is smaller than the sum of its proper divisors (8975190883248).

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

5661061161072 is a wasteful number, since it uses less digits than its factorization.

5661061161072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19290 (or 19284 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 5661061161072 in words is "five trillion, six hundred sixty-one billion, sixty-one million, one hundred sixty-one thousand, seventy-two".