61943616 has 168 divisors, whose sum is σ = 210799680. Its totient is φ = 17667072.

The previous prime is 61943599. The next prime is 61943617. The reversal of 61943616 is 61634916.

61943616 is a `hidden beast` number, since 619 + 4 + 36 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61943617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108580 + ... + 109148.

It is an arithmetic number, because the mean of its divisors is an integer number (1254760).

Almost surely, 2^61943616 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 61943616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105399840).

61943616 is an abundant number, since it is smaller than the sum of its proper divisors (148856064).

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

61943616 is an equidigital number, since it uses as much as digits as its factorization.

61943616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 581 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 61943616 is about 7870.4266720426. The cubic root of 61943616 is about 395.6691451380.

The spelling of 61943616 in words is "sixty-one million, nine hundred forty-three thousand, six hundred sixteen".