40239554765 has 4 divisors (see below), whose sum is σ = 48287465724. Its totient is φ = 32191643808.

The previous prime is 40239554753. The next prime is 40239554777. The reversal of 40239554765 is 56745593204.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40239554753) and next prime (40239554777).

It can be written as a sum of positive squares in 2 ways, for example, as 28099481641 + 12140073124 = 167629^2 + 110182^2 .

It is a cyclic number.

It is not a de Polignac number, because 40239554765 - 2⁴ = 40239554749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4023955472 + ... + 4023955481.

It is an arithmetic number, because the mean of its divisors is an integer number (12071866431).

Almost surely, 2^40239554765 is an apocalyptic number.

It is an amenable number.

40239554765 is a deficient number, since it is larger than the sum of its proper divisors (8047910959).

40239554765 is an equidigital number, since it uses as much as digits as its factorization.

40239554765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8047910958.

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 40239554765 in words is "forty billion, two hundred thirty-nine million, five hundred fifty-four thousand, seven hundred sixty-five".