61030816 has 192 divisors, whose sum is σ = 167215104. Its totient is φ = 21196800.

The previous prime is 61030811. The next prime is 61030841. The reversal of 61030816 is 61803016.

It is not an unprimeable number, because it can be changed into a prime (61030811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1298505 + ... + 1298551.

It is an arithmetic number, because the mean of its divisors is an integer number (870912).

Almost surely, 2^61030816 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 61030816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83607552).

61030816 is an abundant number, since it is smaller than the sum of its proper divisors (106184288).

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

61030816 is a wasteful number, since it uses less digits than its factorization.

61030816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 61030816 is about 7812.2222190616. Note that the first 4 decimals coincide. The cubic root of 61030816 is about 393.7159951821.

The spelling of 61030816 in words is "sixty-one million, thirty thousand, eight hundred sixteen".