61691322 has 64 divisors (see below), whose sum is σ = 156201984. Its totient is φ = 15776640.

The previous prime is 61691299. The next prime is 61691363. The reversal of 61691322 is 22319616.

It is a self number, because there is not a number n which added to its sum of digits gives 61691322.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29958 + ... + 31950.

It is an arithmetic number, because the mean of its divisors is an integer number (2440656).

Almost surely, 2^61691322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61691322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78100992).

61691322 is an abundant number, since it is smaller than the sum of its proper divisors (94510662).

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

61691322 is a wasteful number, since it uses less digits than its factorization.

61691322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083.

The product of its digits is 3888, while the sum is 30.

The square root of 61691322 is about 7854.3823436347. The cubic root of 61691322 is about 395.1312323661.

The spelling of 61691322 in words is "sixty-one million, six hundred ninety-one thousand, three hundred twenty-two".