61012420993 has 2 divisors, whose sum is σ = 61012420994. Its totient is φ = 61012420992.

The previous prime is 61012420991. The next prime is 61012421009. The reversal of 61012420993 is 39902421016.

61012420993 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., 50936878864 + 10075542129 = 225692^2 + 100377^2 .

It is a cyclic number.

It is not a de Polignac number, because 61012420993 - 2¹ = 61012420991 is a prime.

Together with 61012420991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61012420991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30506210496 + 30506210497.

It is an arithmetic number, because the mean of its divisors is an integer number (30506210497).

Almost surely, 2^61012420993 is an apocalyptic number.

It is an amenable number.

61012420993 is a deficient number, since it is larger than the sum of its proper divisors (1).

61012420993 is an equidigital number, since it uses as much as digits as its factorization.

61012420993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 61012420993 in words is "sixty-one billion, twelve million, four hundred twenty thousand, nine hundred ninety-three".