5042639640 has 32 divisors (see below), whose sum is σ = 15127919280. Its totient is φ = 1344703872.

The previous prime is 5042639629. The next prime is 5042639659. The reversal of 5042639640 is 469362405.

It is a congruent number.

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, 21010879 + ... + 21011118.

Almost surely, 2^5042639640 is an apocalyptic number.

It is an amenable number.

5042639640 is an abundant number, since it is smaller than the sum of its proper divisors (10085279640).

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

5042639640 is a wasteful number, since it uses less digits than its factorization.

5042639640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42022011 (or 42022007 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 5042639640 is about 71011.5458217887. The cubic root of 5042639640 is about 1714.8230446950.

The spelling of 5042639640 in words is "five billion, forty-two million, six hundred thirty-nine thousand, six hundred forty".