42727171409 has 16 divisors (see below), whose sum is σ = 46697925120. Its totient is φ = 38856317760.

The previous prime is 42727171397. The next prime is 42727171411. The reversal of 42727171409 is 90417172724.

It is not a de Polignac number, because 42727171409 - 2²⁸ = 42458735953 is a prime.

It is a super-2 number, since 2×42727171409² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42727171409.

It is not an unprimeable number, because it can be changed into a prime (42727171439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428324 + ... + 518570.

It is an arithmetic number, because the mean of its divisors is an integer number (2918620320).

Almost surely, 2^42727171409 is an apocalyptic number.

It is an amenable number.

42727171409 is a deficient number, since it is larger than the sum of its proper divisors (3970753711).

42727171409 is a wasteful number, since it uses less digits than its factorization.

42727171409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90800.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 42727171409 in words is "forty-two billion, seven hundred twenty-seven million, one hundred seventy-one thousand, four hundred nine".