61011816 has 64 divisors (see below), whose sum is σ = 158177280. Its totient is φ = 19595520.

The previous prime is 61011803. The next prime is 61011823. The reversal of 61011816 is 61811016.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112506 + ... + 113046.

It is an arithmetic number, because the mean of its divisors is an integer number (2471520).

Almost surely, 2^61011816 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 61011816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79088640).

61011816 is an abundant number, since it is smaller than the sum of its proper divisors (97165464).

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

61011816 is a wasteful number, since it uses less digits than its factorization.

61011816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 61011816 is about 7811.0060811652. The cubic root of 61011816 is about 393.6751339647.

The spelling of 61011816 in words is "sixty-one million, eleven thousand, eight hundred sixteen".