61945722 has 80 divisors (see below), whose sum is σ = 149288832. Its totient is φ = 19128960.

The previous prime is 61945703. The next prime is 61945727. The reversal of 61945722 is 22754916.

61945722 = 379² + 380² + ... + 621².

It is not an unprimeable number, because it can be changed into a prime (61945727) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 228447 + ... + 228717.

Almost surely, 2^61945722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61945722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74644416).

61945722 is an abundant number, since it is smaller than the sum of its proper divisors (87343110).

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

61945722 is a wasteful number, since it uses less digits than its factorization.

61945722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 376 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 61945722 is about 7870.5604628895. The cubic root of 61945722 is about 395.6736291609.

The spelling of 61945722 in words is "sixty-one million, nine hundred forty-five thousand, seven hundred twenty-two".