61825621 has 16 divisors (see below), whose sum is σ = 73523520. Its totient is φ = 51246720.

The previous prime is 61825619. The next prime is 61825627. The reversal of 61825621 is 12652816.

It is a cyclic number.

It is not a de Polignac number, because 61825621 - 2¹ = 61825619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61825627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9265 + ... + 14473.

It is an arithmetic number, because the mean of its divisors is an integer number (4595220).

Almost surely, 2^61825621 is an apocalyptic number.

It is an amenable number.

61825621 is a deficient number, since it is larger than the sum of its proper divisors (11697899).

61825621 is a wasteful number, since it uses less digits than its factorization.

61825621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316.

The product of its digits is 5760, while the sum is 31.

The square root of 61825621 is about 7862.9269995340. The cubic root of 61825621 is about 395.4177516959.

The spelling of 61825621 in words is "sixty-one million, eight hundred twenty-five thousand, six hundred twenty-one".