42072641885 has 4 divisors (see below), whose sum is σ = 50487170268. Its totient is φ = 33658113504.

The previous prime is 42072641881. The next prime is 42072641899. The reversal of 42072641885 is 58814627024.

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 22300344889 + 19772296996 = 149333^2 + 140614^2 .

It is a cyclic number.

It is not a de Polignac number, because 42072641885 - 2² = 42072641881 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 (42072641881) 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, 4207264184 + ... + 4207264193.

It is an arithmetic number, because the mean of its divisors is an integer number (12621792567).

Almost surely, 2^42072641885 is an apocalyptic number.

It is an amenable number.

42072641885 is a deficient number, since it is larger than the sum of its proper divisors (8414528383).

42072641885 is an equidigital number, since it uses as much as digits as its factorization.

42072641885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8414528382.

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 42072641885 in words is "forty-two billion, seventy-two million, six hundred forty-one thousand, eight hundred eighty-five".