61994845 has 16 divisors (see below), whose sum is σ = 81329472. Its totient is φ = 44991360.

The previous prime is 61994839. The next prime is 61994873. The reversal of 61994845 is 54849916.

It is a happy number.

It is not a de Polignac number, because 61994845 - 2⁹ = 61994333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61994795 and 61994804.

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, 34489 + ... + 36241.

It is an arithmetic number, because the mean of its divisors is an integer number (5083092).

Almost surely, 2^61994845 is an apocalyptic number.

It is an amenable number.

61994845 is a deficient number, since it is larger than the sum of its proper divisors (19334627).

61994845 is a wasteful number, since it uses less digits than its factorization.

61994845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412.

The product of its digits is 311040, while the sum is 46.

The square root of 61994845 is about 7873.6805243799. The cubic root of 61994845 is about 395.7781913461.

Subtracting from 61994845 its reverse (54849916), we obtain a square (7144929 = 2673²).

The spelling of 61994845 in words is "sixty-one million, nine hundred ninety-four thousand, eight hundred forty-five".