61638367 has 8 divisors (see below), whose sum is σ = 73506816. Its totient is φ = 50535672.

The previous prime is 61638361. The next prime is 61638371. The reversal of 61638367 is 76383616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61638367 - 2¹¹ = 61636319 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61638361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191263 + ... + 191584.

It is an arithmetic number, because the mean of its divisors is an integer number (9188352).

Almost surely, 2^61638367 is an apocalyptic number.

61638367 is a deficient number, since it is larger than the sum of its proper divisors (11868449).

61638367 is a wasteful number, since it uses less digits than its factorization.

61638367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382877.

The product of its digits is 108864, while the sum is 40.

The square root of 61638367 is about 7851.0105718946. The cubic root of 61638367 is about 395.0181415585.

It can be divided in two parts, 616 and 38367, that added together give a palindrome (38983).

The spelling of 61638367 in words is "sixty-one million, six hundred thirty-eight thousand, three hundred sixty-seven".