61031083880 has 32 divisors (see below), whose sum is σ = 147883012200. Its totient is φ = 22534553856.

The previous prime is 61031083849. The next prime is 61031083889. The reversal of 61031083880 is 8838013016.

It can be written as a sum of positive squares in 4 ways, for example, as 26134602244 + 34896481636 = 161662^2 + 186806^2 .

It is not an unprimeable number, because it can be changed into a prime (61031083889) 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, 58683215 + ... + 58684254.

Almost surely, 2^61031083880 is an apocalyptic number.

It is an amenable number.

61031083880 is an abundant number, since it is smaller than the sum of its proper divisors (86851928320).

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

61031083880 is a wasteful number, since it uses less digits than its factorization.

61031083880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117367493 (or 117367489 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

Adding to 61031083880 its reverse (8838013016), we get a palindrome (69869096896).

The spelling of 61031083880 in words is "sixty-one billion, thirty-one million, eighty-three thousand, eight hundred eighty".