61617173768 has 16 divisors (see below), whose sum is σ = 115535054160. Its totient is φ = 30807826000.

The previous prime is 61617173767. The next prime is 61617173789. The reversal of 61617173768 is 86737171616.

It is a happy number.

It is a super-2 number, since 2×61617173768² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61617173767) by changing a digit.

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, 401723 + ... + 533493.

It is an arithmetic number, because the mean of its divisors is an integer number (7220940885).

Almost surely, 2^61617173768 is an apocalyptic number.

It is an amenable number.

61617173768 is a deficient number, since it is larger than the sum of its proper divisors (53917880392).

61617173768 is a wasteful number, since it uses less digits than its factorization.

61617173768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190228 (or 190224 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 53.

The spelling of 61617173768 in words is "sixty-one billion, six hundred seventeen million, one hundred seventy-three thousand, seven hundred sixty-eight".