61636245 has 16 divisors (see below), whose sum is σ = 107583552. Its totient is φ = 29884160.

The previous prime is 61636241. The next prime is 61636249. The reversal of 61636245 is 54263616.

It is an interprime number because it is at equal distance from previous prime (61636241) and next prime (61636249).

It is not a de Polignac number, because 61636245 - 2² = 61636241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61636241) 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, 186612 + ... + 186941.

It is an arithmetic number, because the mean of its divisors is an integer number (6723972).

Almost surely, 2^61636245 is an apocalyptic number.

It is an amenable number.

61636245 is a deficient number, since it is larger than the sum of its proper divisors (45947307).

61636245 is a wasteful number, since it uses less digits than its factorization.

61636245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373572.

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

The square root of 61636245 is about 7850.8754288933. The cubic root of 61636245 is about 395.0136084614.

The spelling of 61636245 in words is "sixty-one million, six hundred thirty-six thousand, two hundred forty-five".