40720255721 has 16 divisors (see below), whose sum is σ = 42371078400. Its totient is φ = 39086439168.

The previous prime is 40720255717. The next prime is 40720255727. The reversal of 40720255721 is 12755202704.

It is a cyclic number.

It is not a de Polignac number, because 40720255721 - 2² = 40720255717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40720255727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4452065 + ... + 4461201.

It is an arithmetic number, because the mean of its divisors is an integer number (2648192400).

Almost surely, 2^40720255721 is an apocalyptic number.

It is an amenable number.

40720255721 is a deficient number, since it is larger than the sum of its proper divisors (1650822679).

40720255721 is a wasteful number, since it uses less digits than its factorization.

40720255721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10048.

The product of its (nonzero) digits is 39200, while the sum is 35.

The spelling of 40720255721 in words is "forty billion, seven hundred twenty million, two hundred fifty-five thousand, seven hundred twenty-one".