61316320 has 96 divisors (see below), whose sum is σ = 160030080. Its totient is φ = 22056960.

The previous prime is 61316317. The next prime is 61316327. The reversal of 61316320 is 2361316.

It is a junction number, because it is equal to n+sod(n) for n = 61316291 and 61316300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61316327) 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, 84921 + ... + 85639.

It is an arithmetic number, because the mean of its divisors is an integer number (1666980).

Almost surely, 2^61316320 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 61316320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80015040).

61316320 is an abundant number, since it is smaller than the sum of its proper divisors (98713760).

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

61316320 is a wasteful number, since it uses less digits than its factorization.

61316320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 61316320 is about 7830.4738043109. The cubic root of 61316320 is about 394.3289787593.

Adding to 61316320 its reverse (2361316), we get a palindrome (63677636).

The spelling of 61316320 in words is "sixty-one million, three hundred sixteen thousand, three hundred twenty".