61049969489 has 2 divisors, whose sum is σ = 61049969490. Its totient is φ = 61049969488.

The previous prime is 61049969473. The next prime is 61049969503. The reversal of 61049969489 is 98496994016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30672268225 + 30377701264 = 175135^2 + 174292^2 .

It is a cyclic number.

It is not a de Polignac number, because 61049969489 - 2⁴ = 61049969473 is a prime.

It is a super-2 number, since 2×61049969489² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61049969419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30524984744 + 30524984745.

It is an arithmetic number, because the mean of its divisors is an integer number (30524984745).

Almost surely, 2^61049969489 is an apocalyptic number.

It is an amenable number.

61049969489 is a deficient number, since it is larger than the sum of its proper divisors (1).

61049969489 is an equidigital number, since it uses as much as digits as its factorization.

61049969489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30233088, while the sum is 65.

The spelling of 61049969489 in words is "sixty-one billion, forty-nine million, nine hundred sixty-nine thousand, four hundred eighty-nine".