40505501901 has 4 divisors (see below), whose sum is σ = 54007335872. Its totient is φ = 27003667932.

The previous prime is 40505501893. The next prime is 40505501923. The reversal of 40505501901 is 10910550504.

40505501901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 40505501901 - 2³ = 40505501893 is a prime.

It is a super-2 number, since 2×40505501901² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505503901) 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, 6750916981 + ... + 6750916986.

It is an arithmetic number, because the mean of its divisors is an integer number (13501833968).

Almost surely, 2^40505501901 is an apocalyptic number.

It is an amenable number.

40505501901 is a deficient number, since it is larger than the sum of its proper divisors (13501833971).

40505501901 is a wasteful number, since it uses less digits than its factorization.

40505501901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13501833970.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 40505501901 in words is "forty billion, five hundred five million, five hundred one thousand, nine hundred one".