61223502569 has 16 divisors (see below), whose sum is σ = 63990803520. Its totient is φ = 58501060800.

The previous prime is 61223502559. The next prime is 61223502617. The reversal of 61223502569 is 96520532216.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61223502569 is a prime.

It is a super-2 number, since 2×61223502569² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61223502559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3251867 + ... + 3270639.

It is an arithmetic number, because the mean of its divisors is an integer number (3999425220).

Almost surely, 2^61223502569 is an apocalyptic number.

It is an amenable number.

61223502569 is a deficient number, since it is larger than the sum of its proper divisors (2767300951).

61223502569 is a wasteful number, since it uses less digits than its factorization.

61223502569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19960.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 61223502569 in words is "sixty-one billion, two hundred twenty-three million, five hundred two thousand, five hundred sixty-nine".