42640357369 has 8 divisors (see below), whose sum is σ = 44018250752. Its totient is φ = 41262613920.

The previous prime is 42640357337. The next prime is 42640357387. The reversal of 42640357369 is 96375304624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42640357369 - 2⁵ = 42640357337 is a prime.

It is a super-2 number, since 2×42640357369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42640357399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975037 + ... + 1017829.

It is an arithmetic number, because the mean of its divisors is an integer number (5502281344).

Almost surely, 2^42640357369 is an apocalyptic number.

It is an amenable number.

42640357369 is a deficient number, since it is larger than the sum of its proper divisors (1377893383).

42640357369 is a wasteful number, since it uses less digits than its factorization.

42640357369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74967.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 42640357369 in words is "forty-two billion, six hundred forty million, three hundred fifty-seven thousand, three hundred sixty-nine".