40636431077 has 16 divisors (see below), whose sum is σ = 45565800000. Its totient is φ = 35914544640.

The previous prime is 40636430963. The next prime is 40636431079. The reversal of 40636431077 is 77013463604.

It is a cyclic number.

It is not a de Polignac number, because 40636431077 - 2¹² = 40636426981 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 (40636431079) 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, 468374 + ... + 548312.

It is an arithmetic number, because the mean of its divisors is an integer number (2847862500).

Almost surely, 2^40636431077 is an apocalyptic number.

It is an amenable number.

40636431077 is a deficient number, since it is larger than the sum of its proper divisors (4929368923).

40636431077 is a wasteful number, since it uses less digits than its factorization.

40636431077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81236.

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 40636431077 in words is "forty billion, six hundred thirty-six million, four hundred thirty-one thousand, seventy-seven".