40682721237 has 4 divisors (see below), whose sum is σ = 54243628320. Its totient is φ = 27121814156.

The previous prime is 40682721193. The next prime is 40682721263. The reversal of 40682721237 is 73212728604.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 40682721237 - 2²⁷ = 40548503509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40682701237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6780453537 + ... + 6780453542.

It is an arithmetic number, because the mean of its divisors is an integer number (13560907080).

Almost surely, 2^40682721237 is an apocalyptic number.

It is an amenable number.

40682721237 is a deficient number, since it is larger than the sum of its proper divisors (13560907083).

40682721237 is a wasteful number, since it uses less digits than its factorization.

40682721237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13560907082.

The product of its (nonzero) digits is 225792, while the sum is 42.

The spelling of 40682721237 in words is "forty billion, six hundred eighty-two million, seven hundred twenty-one thousand, two hundred thirty-seven".