61161623 has 4 divisors (see below), whose sum is σ = 63820848. Its totient is φ = 58502400.

The previous prime is 61161619. The next prime is 61161643. The reversal of 61161623 is 32616116.

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 61161623 - 2² = 61161619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61161592 and 61161601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61161613) 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, 1329578 + ... + 1329623.

It is an arithmetic number, because the mean of its divisors is an integer number (15955212).

Almost surely, 2^61161623 is an apocalyptic number.

61161623 is a deficient number, since it is larger than the sum of its proper divisors (2659225).

61161623 is a wasteful number, since it uses less digits than its factorization.

61161623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659224.

The product of its digits is 1296, while the sum is 26.

The square root of 61161623 is about 7820.5896836492. The cubic root of 61161623 is about 393.9970775462.

Adding to 61161623 its reverse (32616116), we get a palindrome (93777739).

The spelling of 61161623 in words is "sixty-one million, one hundred sixty-one thousand, six hundred twenty-three".