40517389761 has 4 divisors (see below), whose sum is σ = 54023186352. Its totient is φ = 27011593172.

The previous prime is 40517389751. The next prime is 40517389799. The reversal of 40517389761 is 16798371504.

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 40517389761 - 2¹⁵ = 40517356993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40517389751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6752898291 + ... + 6752898296.

It is an arithmetic number, because the mean of its divisors is an integer number (13505796588).

Almost surely, 2^40517389761 is an apocalyptic number.

It is an amenable number.

40517389761 is a deficient number, since it is larger than the sum of its proper divisors (13505796591).

40517389761 is a wasteful number, since it uses less digits than its factorization.

40517389761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13505796590.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 40517389761 in words is "forty billion, five hundred seventeen million, three hundred eighty-nine thousand, seven hundred sixty-one".