40405043237 has 32 divisors (see below), whose sum is σ = 48391257600. Its totient is φ = 33389411328.

The previous prime is 40405043213. The next prime is 40405043257. The reversal of 40405043237 is 73234050404.

It is not a de Polignac number, because 40405043237 - 2²⁰ = 40403994661 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 (40405043257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276653 + ... + 396669.

It is an arithmetic number, because the mean of its divisors is an integer number (1512226800).

Almost surely, 2^40405043237 is an apocalyptic number.

40405043237 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

40405043237 is a deficient number, since it is larger than the sum of its proper divisors (7986214363).

40405043237 is a wasteful number, since it uses less digits than its factorization.

40405043237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120125.

The product of its (nonzero) digits is 40320, while the sum is 32.

The spelling of 40405043237 in words is "forty billion, four hundred five million, forty-three thousand, two hundred thirty-seven".