61047443081 has 2 divisors, whose sum is σ = 61047443082. Its totient is φ = 61047443080.

The previous prime is 61047443077. The next prime is 61047443131. The reversal of 61047443081 is 18034474016.

It is a happy number.

61047443081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60407808400 + 639634681 = 245780^2 + 25291^2 .

It is a cyclic number.

It is not a de Polignac number, because 61047443081 - 2² = 61047443077 is a prime.

It is a super-2 number, since 2×61047443081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61047443021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30523721540 + 30523721541.

It is an arithmetic number, because the mean of its divisors is an integer number (30523721541).

Almost surely, 2^61047443081 is an apocalyptic number.

It is an amenable number.

61047443081 is a deficient number, since it is larger than the sum of its proper divisors (1).

61047443081 is an equidigital number, since it uses as much as digits as its factorization.

61047443081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 61047443081 in words is "sixty-one billion, forty-seven million, four hundred forty-three thousand, eighty-one".