61230732881 has 8 divisors (see below), whose sum is σ = 61299947880. Its totient is φ = 61161551872.

The previous prime is 61230732863. The next prime is 61230732883. The reversal of 61230732881 is 18823703216.

It can be written as a sum of positive squares in 4 ways, for example, as 37156417600 + 24074315281 = 192760^2 + 155159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61230732881 is a prime.

It is a super-2 number, since 2×61230732881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61230732883) 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, 5368721 + ... + 5380113.

It is an arithmetic number, because the mean of its divisors is an integer number (7662493485).

Almost surely, 2^61230732881 is an apocalyptic number.

It is an amenable number.

61230732881 is a deficient number, since it is larger than the sum of its proper divisors (69214999).

61230732881 is a wasteful number, since it uses less digits than its factorization.

61230732881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16995.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 61230732881 in words is "sixty-one billion, two hundred thirty million, seven hundred thirty-two thousand, eight hundred eighty-one".