61172445 has 16 divisors (see below), whose sum is σ = 100153152. Its totient is φ = 31866240.

The previous prime is 61172417. The next prime is 61172453. The reversal of 61172445 is 54427116.

It is not a de Polignac number, because 61172445 - 2⁷ = 61172317 is a prime.

It is a Curzon number.

It is a congruent 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, 46776 + ... + 48065.

It is an arithmetic number, because the mean of its divisors is an integer number (6259572).

Almost surely, 2^61172445 is an apocalyptic number.

It is an amenable number.

61172445 is a deficient number, since it is larger than the sum of its proper divisors (38980707).

61172445 is a wasteful number, since it uses less digits than its factorization.

61172445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94892.

The product of its digits is 6720, while the sum is 30.

The square root of 61172445 is about 7821.2815446064. The cubic root of 61172445 is about 394.0203142575.

The spelling of 61172445 in words is "sixty-one million, one hundred seventy-two thousand, four hundred forty-five".