42722925989 has 4 divisors (see below), whose sum is σ = 42724467660. Its totient is φ = 42721384320.

The previous prime is 42722925943. The next prime is 42722925991. The reversal of 42722925989 is 98952922724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15028308100 + 27694617889 = 122590^2 + 166417^2 .

It is a cyclic number.

It is not a de Polignac number, because 42722925989 - 2²⁴ = 42706148773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42722925919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728492 + ... + 784949.

It is an arithmetic number, because the mean of its divisors is an integer number (10681116915).

Almost surely, 2^42722925989 is an apocalyptic number.

It is an amenable number.

42722925989 is a deficient number, since it is larger than the sum of its proper divisors (1541671).

42722925989 is a wasteful number, since it uses less digits than its factorization.

42722925989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541670.

The product of its digits is 13063680, while the sum is 59.

The spelling of 42722925989 in words is "forty-two billion, seven hundred twenty-two million, nine hundred twenty-five thousand, nine hundred eighty-nine".