61969544 has 64 divisors (see below), whose sum is σ = 149264640. Its totient is φ = 23443200.

The previous prime is 61969541. The next prime is 61969553. The reversal of 61969544 is 44596916.

It is a junction number, because it is equal to n+sod(n) for n = 61969495 and 61969504.

It is not an unprimeable number, because it can be changed into a prime (61969541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14894 + ... + 18594.

It is an arithmetic number, because the mean of its divisors is an integer number (2332260).

Almost surely, 2^61969544 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 61969544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74632320).

61969544 is an abundant number, since it is smaller than the sum of its proper divisors (87295096).

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

61969544 is a wasteful number, since it uses less digits than its factorization.

61969544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750 (or 3746 counting only the distinct ones).

The product of its digits is 233280, while the sum is 44.

The square root of 61969544 is about 7872.0736785170. The cubic root of 61969544 is about 395.7243430702.

The spelling of 61969544 in words is "sixty-one million, nine hundred sixty-nine thousand, five hundred forty-four".