42721893872 has 20 divisors (see below), whose sum is σ = 94598479536. Its totient is φ = 18309383040.

The previous prime is 42721893821. The next prime is 42721893883. The reversal of 42721893872 is 27839812724.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190722629 + ... + 190722852.

Almost surely, 2^42721893872 is an apocalyptic number.

It is an amenable number.

42721893872 is an abundant number, since it is smaller than the sum of its proper divisors (51876585664).

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

42721893872 is a wasteful number, since it uses less digits than its factorization.

42721893872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381445496 (or 381445490 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The spelling of 42721893872 in words is "forty-two billion, seven hundred twenty-one million, eight hundred ninety-three thousand, eight hundred seventy-two".