61646253 has 4 divisors (see below), whose sum is σ = 82195008. Its totient is φ = 41097500.

The previous prime is 61646251. The next prime is 61646287. The reversal of 61646253 is 35264616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61646253 - 2¹ = 61646251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61646251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10274373 + ... + 10274378.

It is an arithmetic number, because the mean of its divisors is an integer number (20548752).

Almost surely, 2^61646253 is an apocalyptic number.

It is an amenable number.

61646253 is a deficient number, since it is larger than the sum of its proper divisors (20548755).

61646253 is a wasteful number, since it uses less digits than its factorization.

61646253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20548754.

The product of its digits is 25920, while the sum is 33.

The square root of 61646253 is about 7851.5127841710. The cubic root of 61646253 is about 395.0349870200.

The spelling of 61646253 in words is "sixty-one million, six hundred forty-six thousand, two hundred fifty-three".