40345311505 has 4 divisors (see below), whose sum is σ = 48414373812. Its totient is φ = 32276249200.

The previous prime is 40345311463. The next prime is 40345311509. The reversal of 40345311505 is 50511354304.

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 7376920321 + 32968391184 = 85889^2 + 181572^2 .

It is a de Polignac number, because none of the positive numbers 2^k-40345311505 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40345311509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4034531146 + ... + 4034531155.

It is an arithmetic number, because the mean of its divisors is an integer number (12103593453).

Almost surely, 2^40345311505 is an apocalyptic number.

It is an amenable number.

40345311505 is a deficient number, since it is larger than the sum of its proper divisors (8069062307).

40345311505 is an equidigital number, since it uses as much as digits as its factorization.

40345311505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069062306.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 40345311505 its reverse (50511354304), we get a palindrome (90856665809).

The spelling of 40345311505 in words is "forty billion, three hundred forty-five million, three hundred eleven thousand, five hundred five".