61469802661 has 2 divisors, whose sum is σ = 61469802662. Its totient is φ = 61469802660.

The previous prime is 61469802637. The next prime is 61469802671. The reversal of 61469802661 is 16620896416.

61469802661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61067800161 + 402002500 = 247119^2 + 20050^2 .

It is a cyclic number.

It is not a de Polignac number, because 61469802661 - 2¹⁹ = 61469278373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61469802671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30734901330 + 30734901331.

It is an arithmetic number, because the mean of its divisors is an integer number (30734901331).

Almost surely, 2^61469802661 is an apocalyptic number.

It is an amenable number.

61469802661 is a deficient number, since it is larger than the sum of its proper divisors (1).

61469802661 is an equidigital number, since it uses as much as digits as its factorization.

61469802661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 61469802661 in words is "sixty-one billion, four hundred sixty-nine million, eight hundred two thousand, six hundred sixty-one".