61643442 has 32 divisors (see below), whose sum is σ = 141926400. Its totient is φ = 17484048.

The previous prime is 61643423. The next prime is 61643471. The reversal of 61643442 is 24434616.

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, 559 + ... + 11117.

It is an arithmetic number, because the mean of its divisors is an integer number (4435200).

Almost surely, 2^61643442 is an apocalyptic number.

61643442 is an abundant number, since it is smaller than the sum of its proper divisors (80282958).

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

61643442 is a wasteful number, since it uses less digits than its factorization.

61643442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10710.

The product of its digits is 13824, while the sum is 30.

The square root of 61643442 is about 7851.3337720415. Note that the first 3 decimals coincide. The cubic root of 61643442 is about 395.0289825447.

The spelling of 61643442 in words is "sixty-one million, six hundred forty-three thousand, four hundred forty-two".