40205558377 has 4 divisors (see below), whose sum is σ = 40320760900. Its totient is φ = 40090355856.

The previous prime is 40205558369. The next prime is 40205558423. The reversal of 40205558377 is 77385550204.

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 33497784576 + 6707773801 = 183024^2 + 81901^2 .

It is a cyclic number.

It is not a de Polignac number, because 40205558377 - 2³ = 40205558369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40205558347) 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, 57600738 + ... + 57601435.

It is an arithmetic number, because the mean of its divisors is an integer number (10080190225).

Almost surely, 2^40205558377 is an apocalyptic number.

It is an amenable number.

40205558377 is a deficient number, since it is larger than the sum of its proper divisors (115202523).

40205558377 is a wasteful number, since it uses less digits than its factorization.

40205558377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115202522.

The product of its (nonzero) digits is 1176000, while the sum is 46.

The spelling of 40205558377 in words is "forty billion, two hundred five million, five hundred fifty-eight thousand, three hundred seventy-seven".