61111904 has 96 divisors (see below), whose sum is σ = 147329280. Its totient is φ = 24371712.

The previous prime is 61111879. The next prime is 61111907. The reversal of 61111904 is 40911116.

61111904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61111904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61111907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353162 + ... + 353334.

It is an arithmetic number, because the mean of its divisors is an integer number (1534680).

Almost surely, 2^61111904 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 61111904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73664640).

61111904 is an abundant number, since it is smaller than the sum of its proper divisors (86217376).

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

61111904 is a wasteful number, since it uses less digits than its factorization.

61111904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 61111904 is about 7817.4103128850. The cubic root of 61111904 is about 393.8902869902.

The spelling of 61111904 in words is "sixty-one million, one hundred eleven thousand, nine hundred four".