61019712 has 168 divisors, whose sum is σ = 195544440. Its totient is φ = 18063360.

The previous prime is 61019711. The next prime is 61019719. The reversal of 61019712 is 21791016.

It can be written as a sum of positive squares in 4 ways, for example, as 5308416 + 55711296 = 2304^2 + 7464^2 .

It is not an unprimeable number, because it can be changed into a prime (61019711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217012 + ... + 217292.

It is an arithmetic number, because the mean of its divisors is an integer number (1163955).

Almost surely, 2^61019712 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 61019712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97772220).

61019712 is an abundant number, since it is smaller than the sum of its proper divisors (134524728).

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

61019712 is a wasteful number, since it uses less digits than its factorization.

61019712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 61019712 is about 7811.5115054642. The cubic root of 61019712 is about 393.6921160565.

The spelling of 61019712 in words is "sixty-one million, nineteen thousand, seven hundred twelve".