61956644 has 24 divisors (see below), whose sum is σ = 118070400. Its totient is φ = 28334880.

The previous prime is 61956607. The next prime is 61956677. The reversal of 61956644 is 44665916.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11852 + ... + 16259.

It is an arithmetic number, because the mean of its divisors is an integer number (4919600).

Almost surely, 2^61956644 is an apocalyptic number.

It is an amenable number.

61956644 is a deficient number, since it is larger than the sum of its proper divisors (56113756).

61956644 is a wasteful number, since it uses less digits than its factorization.

61956644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28163 (or 28161 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 61956644 is about 7871.2542837848. The cubic root of 61956644 is about 395.6968822781.

The spelling of 61956644 in words is "sixty-one million, nine hundred fifty-six thousand, six hundred forty-four".