61990544 has 80 divisors (see below), whose sum is σ = 152180736. Its totient is φ = 23760000.

The previous prime is 61990531. The next prime is 61990553. The reversal of 61990544 is 44509916.

61990544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61990498 and 61990507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82169 + ... + 82919.

Almost surely, 2^61990544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61990544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76090368).

61990544 is an abundant number, since it is smaller than the sum of its proper divisors (90190192).

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

61990544 is a wasteful number, since it uses less digits than its factorization.

61990544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 61990544 is about 7873.4073945148. The cubic root of 61990544 is about 395.7690385348.

The spelling of 61990544 in words is "sixty-one million, nine hundred ninety thousand, five hundred forty-four".