74639253606 has 16 divisors (see below), whose sum is σ = 149342356800. Its totient is φ = 24869109608.

The previous prime is 74639253589. The next prime is 74639253607. The reversal of 74639253606 is 60635293647.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74639253607) 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, 2645196 + ... + 2673263.

It is an arithmetic number, because the mean of its divisors is an integer number (9333897300).

Almost surely, 2^74639253606 is an apocalyptic number.

74639253606 is an abundant number, since it is smaller than the sum of its proper divisors (74703103194).

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

74639253606 is a wasteful number, since it uses less digits than its factorization.

74639253606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5320803.

The product of its (nonzero) digits is 4898880, while the sum is 51.

The spelling of 74639253606 in words is "seventy-four billion, six hundred thirty-nine million, two hundred fifty-three thousand, six hundred six".