61004574643 has 2 divisors, whose sum is σ = 61004574644. Its totient is φ = 61004574642.

The previous prime is 61004574623. The next prime is 61004574661. The reversal of 61004574643 is 34647540016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61004574643 - 2⁵ = 61004574611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61004574596 and 61004574605.

It is not a weakly prime, because it can be changed into another prime (61004574623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30502287321 + 30502287322.

It is an arithmetic number, because the mean of its divisors is an integer number (30502287322).

Almost surely, 2^61004574643 is an apocalyptic number.

61004574643 is a deficient number, since it is larger than the sum of its proper divisors (1).

61004574643 is an equidigital number, since it uses as much as digits as its factorization.

61004574643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 61004574643 in words is "sixty-one billion, four million, five hundred seventy-four thousand, six hundred forty-three".