139664064 has 56 divisors (see below), whose sum is σ = 371541040. Its totient is φ = 46301184.

The previous prime is 139664053. The next prime is 139664071. The reversal of 139664064 is 460466931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35172 + ... + 38940.

Almost surely, 2^139664064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139664064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185770520).

139664064 is an abundant number, since it is smaller than the sum of its proper divisors (231876976).

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

139664064 is a wasteful number, since it uses less digits than its factorization.

139664064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977 (or 3967 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 139664064 is about 11817.9551530711. The cubic root of 139664064 is about 518.8337571441.

The spelling of 139664064 in words is "one hundred thirty-nine million, six hundred sixty-four thousand, sixty-four".