61797816 has 96 divisors (see below), whose sum is σ = 176117760. Its totient is φ = 20297952.

The previous prime is 61797767. The next prime is 61797817. The reversal of 61797816 is 61879716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61797817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161161 + ... + 161543.

It is an arithmetic number, because the mean of its divisors is an integer number (1834560).

Almost surely, 2^61797816 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 61797816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88058880).

61797816 is an abundant number, since it is smaller than the sum of its proper divisors (114319944).

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

61797816 is a wasteful number, since it uses less digits than its factorization.

61797816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 471 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 61797816 is about 7861.1586932207. The cubic root of 61797816 is about 395.3584653837.

The spelling of 61797816 in words is "sixty-one million, seven hundred ninety-seven thousand, eight hundred sixteen".