40405351505 has 4 divisors (see below), whose sum is σ = 48486421812. Its totient is φ = 32324281200.

The previous prime is 40405351489. The next prime is 40405351541. The reversal of 40405351505 is 50515350404.

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 27741900481 + 12663451024 = 166559^2 + 112532^2 .

It is not a de Polignac number, because 40405351505 - 2⁴ = 40405351489 is a prime.

It is a Duffinian number.

It is a Curzon 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, 4040535146 + ... + 4040535155.

It is an arithmetic number, because the mean of its divisors is an integer number (12121605453).

Almost surely, 2^40405351505 is an apocalyptic number.

It is an amenable number.

40405351505 is a deficient number, since it is larger than the sum of its proper divisors (8081070307).

40405351505 is an equidigital number, since it uses as much as digits as its factorization.

40405351505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8081070306.

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 40405351505 in words is "forty billion, four hundred five million, three hundred fifty-one thousand, five hundred five".