40640417237 has 4 divisors (see below), whose sum is σ = 46446191136. Its totient is φ = 34834643340.

The previous prime is 40640417149. The next prime is 40640417239. The reversal of 40640417237 is 73271404604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40640417237 - 2²⁴ = 40623640021 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 40640417237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640417239) 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, 2902886939 + ... + 2902886952.

It is an arithmetic number, because the mean of its divisors is an integer number (11611547784).

Almost surely, 2^40640417237 is an apocalyptic number.

It is an amenable number.

40640417237 is a deficient number, since it is larger than the sum of its proper divisors (5805773899).

40640417237 is an equidigital number, since it uses as much as digits as its factorization.

40640417237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5805773898.

The product of its (nonzero) digits is 112896, while the sum is 38.

The spelling of 40640417237 in words is "forty billion, six hundred forty million, four hundred seventeen thousand, two hundred thirty-seven".