61677845 has 8 divisors (see below), whose sum is σ = 74097720. Its totient is φ = 49286080.

The previous prime is 61677841. The next prime is 61677859. The reversal of 61677845 is 54877616.

It can be written as a sum of positive squares in 4 ways, for example, as 6220036 + 55457809 = 2494^2 + 7447^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61677845 - 2² = 61677841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61677796 and 61677805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61677841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850 + ... + 11259.

It is an arithmetic number, because the mean of its divisors is an integer number (9262215).

Almost surely, 2^61677845 is an apocalyptic number.

It is an amenable number.

61677845 is a deficient number, since it is larger than the sum of its proper divisors (12419875).

61677845 is a wasteful number, since it uses less digits than its factorization.

61677845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14055.

The product of its digits is 282240, while the sum is 44.

The square root of 61677845 is about 7853.5243680783. The cubic root of 61677845 is about 395.1024569983.

The spelling of 61677845 in words is "sixty-one million, six hundred seventy-seven thousand, eight hundred forty-five".