61533396 has 18 divisors (see below), whose sum is σ = 155542842. Its totient is φ = 20511120.

The previous prime is 61533391. The next prime is 61533427. The reversal of 61533396 is 69333516.

61533396 is a `hidden beast` number, since 615 + 3 + 3 + 39 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 36433296 + 25100100 = 6036^2 + 5010^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1709261 = 61533396 / (6 + 1 + 5 + 3 + 3 + 3 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 61533396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61533391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 854595 + ... + 854666.

It is an arithmetic number, because the mean of its divisors is an integer number (8641269).

Almost surely, 2^61533396 is an apocalyptic number.

It is an amenable number.

61533396 is an abundant number, since it is smaller than the sum of its proper divisors (94009446).

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

61533396 is a wasteful number, since it uses less digits than its factorization.

61533396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709271 (or 1709266 counting only the distinct ones).

The product of its digits is 43740, while the sum is 36.

The square root of 61533396 is about 7844.3225328896. The cubic root of 61533396 is about 394.7937736721.

The spelling of 61533396 in words is "sixty-one million, five hundred thirty-three thousand, three hundred ninety-six".