61690452 has 12 divisors (see below), whose sum is σ = 143944416. Its totient is φ = 20563480.

The previous prime is 61690379. The next prime is 61690471. The reversal of 61690452 is 25409616.

61690452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2570424 + ... + 2570447.

It is an arithmetic number, because the mean of its divisors is an integer number (11995368).

Almost surely, 2^61690452 is an apocalyptic number.

It is an amenable number.

61690452 is an abundant number, since it is smaller than the sum of its proper divisors (82253964).

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

61690452 is a wasteful number, since it uses less digits than its factorization.

61690452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140878 (or 5140876 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 61690452 is about 7854.3269603449. The cubic root of 61690452 is about 395.1293749153.

The spelling of 61690452 in words is "sixty-one million, six hundred ninety thousand, four hundred fifty-two".