561060005491 has 2 divisors, whose sum is σ = 561060005492. Its totient is φ = 561060005490.

The previous prime is 561060005479. The next prime is 561060005531. The reversal of 561060005491 is 194500060165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561060005491 - 2⁹ = 561060004979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561060005491.

It is not a weakly prime, because it can be changed into another prime (561060075491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280530002745 + 280530002746.

It is an arithmetic number, because the mean of its divisors is an integer number (280530002746).

Almost surely, 2^561060005491 is an apocalyptic number.

561060005491 is a deficient number, since it is larger than the sum of its proper divisors (1).

561060005491 is an equidigital number, since it uses as much as digits as its factorization.

561060005491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 561060005491 in words is "five hundred sixty-one billion, sixty million, five thousand, four hundred ninety-one".