61233661616 has 20 divisors (see below), whose sum is σ = 120410971032. Its totient is φ = 30159862656.

The previous prime is 61233661579. The next prime is 61233661637. The reversal of 61233661616 is 61616633216.

It is a super-2 number, since 2×61233661616² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28559405 + ... + 28561548.

Almost surely, 2^61233661616 is an apocalyptic number.

It is an amenable number.

61233661616 is a deficient number, since it is larger than the sum of its proper divisors (59177309416).

61233661616 is a wasteful number, since it uses less digits than its factorization.

61233661616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57121028 (or 57121022 counting only the distinct ones).

The product of its digits is 139968, while the sum is 41.

The spelling of 61233661616 in words is "sixty-one billion, two hundred thirty-three million, six hundred sixty-one thousand, six hundred sixteen".