40420629965 has 4 divisors (see below), whose sum is σ = 48504755964. Its totient is φ = 32336503968.

The previous prime is 40420629863. The next prime is 40420630007. The reversal of 40420629965 is 56992602404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12380122756 + 28040507209 = 111266^2 + 167453^2 .

It is a cyclic number.

It is not a de Polignac number, because 40420629965 - 2²⁶ = 40353521101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 4042062992 + ... + 4042063001.

It is an arithmetic number, because the mean of its divisors is an integer number (12126188991).

Almost surely, 2^40420629965 is an apocalyptic number.

It is an amenable number.

40420629965 is a deficient number, since it is larger than the sum of its proper divisors (8084125999).

40420629965 is an equidigital number, since it uses as much as digits as its factorization.

40420629965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8084125998.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 40420629965 in words is "forty billion, four hundred twenty million, six hundred twenty-nine thousand, nine hundred sixty-five".