61116240 has 80 divisors (see below), whose sum is σ = 194112576. Its totient is φ = 15897600.

The previous prime is 61116239. The next prime is 61116247. The reversal of 61116240 is 4261116.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61116247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6735 + ... + 12945.

Almost surely, 2^61116240 is an apocalyptic number.

61116240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61116240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97056288).

61116240 is an abundant number, since it is smaller than the sum of its proper divisors (132996336).

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

61116240 is a wasteful number, since it uses less digits than its factorization.

61116240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6268 (or 6262 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 61116240 is about 7817.6876376586. The cubic root of 61116240 is about 393.8996025124.

Adding to 61116240 its reverse (4261116), we get a palindrome (65377356).

The spelling of 61116240 in words is "sixty-one million, one hundred sixteen thousand, two hundred forty".