61636164 has 12 divisors (see below), whose sum is σ = 143817744. Its totient is φ = 20545384.

The previous prime is 61636151. The next prime is 61636177. The reversal of 61636164 is 46163616.

It is an interprime number because it is at equal distance from previous prime (61636151) and next prime (61636177).

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2568162 + ... + 2568185.

It is an arithmetic number, because the mean of its divisors is an integer number (11984812).

Almost surely, 2^61636164 is an apocalyptic number.

It is an amenable number.

61636164 is an abundant number, since it is smaller than the sum of its proper divisors (82181580).

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

61636164 is a wasteful number, since it uses less digits than its factorization.

61636164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136354 (or 5136352 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 61636164 is about 7850.8702702312. The cubic root of 61636164 is about 395.0134354240.

The spelling of 61636164 in words is "sixty-one million, six hundred thirty-six thousand, one hundred sixty-four".