612065538 has 64 divisors (see below), whose sum is σ = 1570571520. Its totient is φ = 173062656.

The previous prime is 612065533. The next prime is 612065579. The reversal of 612065538 is 835560216.

612065538 is a `hidden beast` number, since 61 + 2 + 0 + 65 + 538 = 666.

It is not an unprimeable number, because it can be changed into a prime (612065533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28320 + ... + 45012.

It is an arithmetic number, because the mean of its divisors is an integer number (24540180).

Almost surely, 2^612065538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612065538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785285760).

612065538 is an abundant number, since it is smaller than the sum of its proper divisors (958505982).

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

612065538 is a wasteful number, since it uses less digits than its factorization.

612065538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16808 (or 16802 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 612065538 is about 24739.9583265615. The cubic root of 612065538 is about 849.0487804259.

The spelling of 612065538 in words is "six hundred twelve million, sixty-five thousand, five hundred thirty-eight".