40637644537 has 8 divisors (see below), whose sum is σ = 46797550272. Its totient is φ = 34566370800.

The previous prime is 40637644519. The next prime is 40637644547. The reversal of 40637644537 is 73544673604.

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 40637644537 - 2⁷ = 40637644409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40637644547) 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, 22157014 + ... + 22158847.

It is an arithmetic number, because the mean of its divisors is an integer number (5849693784).

Almost surely, 2^40637644537 is an apocalyptic number.

It is an amenable number.

40637644537 is a deficient number, since it is larger than the sum of its proper divisors (6159905735).

40637644537 is a wasteful number, since it uses less digits than its factorization.

40637644537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44315999.

The product of its (nonzero) digits is 5080320, while the sum is 49.

The spelling of 40637644537 in words is "forty billion, six hundred thirty-seven million, six hundred forty-four thousand, five hundred thirty-seven".