42953806009 has 9 divisors (see below), whose sum is σ = 44907544549. Its totient is φ = 41081689660.

The previous prime is 42953805971. The next prime is 42953806031. The reversal of 42953806009 is 90060835924.

The square root of 42953806009 is 207253.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-42953806009 is a prime.

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 42953806009.

It is not an unprimeable number, because it can be changed into a prime (42953806039) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4762314 + ... + 4771324.

Almost surely, 2^42953806009 is an apocalyptic number.

42953806009 is the 207253-rd square number.

42953806009 is the 103627-th centered octagonal number.

It is an amenable number.

42953806009 is a deficient number, since it is larger than the sum of its proper divisors (1953738540).

42953806009 is an frugal number, since it uses more digits than its factorization.

42953806009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18068 (or 9034 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

It can be divided in two parts, 4295 and 3806009, that added together give a square (3810304 = 1952²).

The spelling of 42953806009 in words is "forty-two billion, nine hundred fifty-three million, eight hundred six thousand, nine".