61173345 has 16 divisors (see below), whose sum is σ = 99339840. Its totient is φ = 32138304.

The previous prime is 61173313. The next prime is 61173379. The reversal of 61173345 is 54337116.

61173345 = 1835² + 1836² + ... + 1852².

It is not a de Polignac number, because 61173345 - 2⁵ = 61173313 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29430 + ... + 31439.

It is an arithmetic number, because the mean of its divisors is an integer number (6208740).

Almost surely, 2^61173345 is an apocalyptic number.

It is an amenable number.

61173345 is a deficient number, since it is larger than the sum of its proper divisors (38166495).

61173345 is a wasteful number, since it uses less digits than its factorization.

61173345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60944.

The product of its digits is 7560, while the sum is 30.

The square root of 61173345 is about 7821.3390797229. The cubic root of 61173345 is about 394.0222465901.

The spelling of 61173345 in words is "sixty-one million, one hundred seventy-three thousand, three hundred forty-five".