64611738 has 48 divisors (see below), whose sum is σ = 146914560. Its totient is φ = 20483232.

The previous prime is 64611737. The next prime is 64611769. The reversal of 64611738 is 83711646.

64611738 is a `hidden beast` number, since 6 + 4 + 611 + 7 + 38 = 666.

It is not an unprimeable number, because it can be changed into a prime (64611737) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98620 + ... + 99272.

It is an arithmetic number, because the mean of its divisors is an integer number (3060720).

Almost surely, 2^64611738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64611738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73457280).

64611738 is an abundant number, since it is smaller than the sum of its proper divisors (82302822).

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

64611738 is a wasteful number, since it uses less digits than its factorization.

64611738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923 (or 920 counting only the distinct ones).

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

The square root of 64611738 is about 8038.1426959217. The cubic root of 64611738 is about 401.2704150093.

The spelling of 64611738 in words is "sixty-four million, six hundred eleven thousand, seven hundred thirty-eight".