40475536991 has 4 divisors (see below), whose sum is σ = 40876284984. Its totient is φ = 40074789000.

The previous prime is 40475536957. The next prime is 40475536993. The reversal of 40475536991 is 19963557404.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40475536991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40475536993) 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, 200373845 + ... + 200374046.

It is an arithmetic number, because the mean of its divisors is an integer number (10219071246).

Almost surely, 2^40475536991 is an apocalyptic number.

40475536991 is a deficient number, since it is larger than the sum of its proper divisors (400747993).

40475536991 is a wasteful number, since it uses less digits than its factorization.

40475536991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400747992.

The product of its (nonzero) digits is 4082400, while the sum is 53.

The spelling of 40475536991 in words is "forty billion, four hundred seventy-five million, five hundred thirty-six thousand, nine hundred ninety-one".