61764138 has 24 divisors (see below), whose sum is σ = 134018976. Its totient is φ = 20557800.

The previous prime is 61764127. The next prime is 61764139. The reversal of 61764138 is 83146716.

61764138 is a `hidden beast` number, since 6 + 1 + 7 + 641 + 3 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (61764139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12483 + ... + 16713.

It is an arithmetic number, because the mean of its divisors is an integer number (5584124).

Almost surely, 2^61764138 is an apocalyptic number.

61764138 is an abundant number, since it is smaller than the sum of its proper divisors (72254838).

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

61764138 is a wasteful number, since it uses less digits than its factorization.

61764138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050 (or 5047 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 61764138 is about 7859.0163506637. The cubic root of 61764138 is about 395.2866327380.

The spelling of 61764138 in words is "sixty-one million, seven hundred sixty-four thousand, one hundred thirty-eight".