61994646 has 48 divisors (see below), whose sum is σ = 159204864. Its totient is φ = 17711784.

The previous prime is 61994629. The next prime is 61994677. The reversal of 61994646 is 64649916.

It is a super-2 number, since 2×61994646² = 7686672265330632, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 5710 + ... + 12513.

It is an arithmetic number, because the mean of its divisors is an integer number (3316768).

Almost surely, 2^61994646 is an apocalyptic number.

61994646 is an abundant number, since it is smaller than the sum of its proper divisors (97210218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61994646 is a wasteful number, since it uses less digits than its factorization.

61994646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18247 (or 18235 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 61994646 is about 7873.6678873318. The cubic root of 61994646 is about 395.7777678704. Note that the first 4 decimals are identical.

The spelling of 61994646 in words is "sixty-one million, nine hundred ninety-four thousand, six hundred forty-six".