61162776 has 80 divisors (see below), whose sum is σ = 176011440. Its totient is φ = 19828800.

The previous prime is 61162723. The next prime is 61162789. The reversal of 61162776 is 67726116.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 61162776.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22701 + ... + 25251.

It is an arithmetic number, because the mean of its divisors is an integer number (2200143).

Almost surely, 2^61162776 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 61162776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88005720).

61162776 is an abundant number, since it is smaller than the sum of its proper divisors (114848664).

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

61162776 is a wasteful number, since it uses less digits than its factorization.

61162776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606 (or 2593 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 61162776 is about 7820.6633989707. The cubic root of 61162776 is about 393.9995533677. Note that the first 3 decimals are identical.

The spelling of 61162776 in words is "sixty-one million, one hundred sixty-two thousand, seven hundred seventy-six".