40420072545 has 32 divisors (see below), whose sum is σ = 66936654720. Its totient is φ = 20803292160.

The previous prime is 40420072529. The next prime is 40420072577. The reversal of 40420072545 is 54527002404.

It is not a de Polignac number, because 40420072545 - 2⁴ = 40420072529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 858825 + ... + 904665.

It is an arithmetic number, because the mean of its divisors is an integer number (2091770460).

Almost surely, 2^40420072545 is an apocalyptic number.

It is an amenable number.

40420072545 is a deficient number, since it is larger than the sum of its proper divisors (26516582175).

40420072545 is a wasteful number, since it uses less digits than its factorization.

40420072545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47905.

The product of its (nonzero) digits is 44800, while the sum is 33.

Adding to 40420072545 its reverse (54527002404), we get a palindrome (94947074949).

The spelling of 40420072545 in words is "forty billion, four hundred twenty million, seventy-two thousand, five hundred forty-five".