61416520 has 64 divisors (see below), whose sum is σ = 152409600. Its totient is φ = 22087680.

The previous prime is 61416479. The next prime is 61416527. The reversal of 61416520 is 2561416.

It is not an unprimeable number, because it can be changed into a prime (61416527) 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, 41961 + ... + 43399.

It is an arithmetic number, because the mean of its divisors is an integer number (2381400).

Almost surely, 2^61416520 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 61416520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76204800).

61416520 is an abundant number, since it is smaller than the sum of its proper divisors (90993080).

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

61416520 is a wasteful number, since it uses less digits than its factorization.

61416520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 61416520 is about 7836.8692728666. The cubic root of 61416520 is about 394.5436592908.

Adding to 61416520 its reverse (2561416), we get a palindrome (63977936).

The spelling of 61416520 in words is "sixty-one million, four hundred sixteen thousand, five hundred twenty".