40203556401 has 4 divisors (see below), whose sum is σ = 53604741872. Its totient is φ = 26802370932.

The previous prime is 40203556397. The next prime is 40203556423. The reversal of 40203556401 is 10465530204.

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 40203556401 - 2² = 40203556397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40203556201) 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, 6700592731 + ... + 6700592736.

It is an arithmetic number, because the mean of its divisors is an integer number (13401185468).

Almost surely, 2^40203556401 is an apocalyptic number.

It is an amenable number.

40203556401 is a deficient number, since it is larger than the sum of its proper divisors (13401185471).

40203556401 is a wasteful number, since it uses less digits than its factorization.

40203556401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13401185470.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 40203556401 in words is "forty billion, two hundred three million, five hundred fifty-six thousand, four hundred one".