61183166123 has 4 divisors (see below), whose sum is σ = 61185608880. Its totient is φ = 61180723368.

The previous prime is 61183166119. The next prime is 61183166173. The reversal of 61183166123 is 32166138116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61183166123 - 2² = 61183166119 is a prime.

It is a super-2 number, since 2×61183166123² (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 (61183166113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183415 + ... + 1234032.

It is an arithmetic number, because the mean of its divisors is an integer number (15296402220).

Almost surely, 2^61183166123 is an apocalyptic number.

61183166123 is a deficient number, since it is larger than the sum of its proper divisors (2442757).

61183166123 is a wasteful number, since it uses less digits than its factorization.

61183166123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442756.

The product of its digits is 31104, while the sum is 38.

The spelling of 61183166123 in words is "sixty-one billion, one hundred eighty-three million, one hundred sixty-six thousand, one hundred twenty-three".