40890677018 has 4 divisors (see below), whose sum is σ = 61336015530. Its totient is φ = 20445338508.

The previous prime is 40890677017. The next prime is 40890677033. The reversal of 40890677018 is 81077609804.

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

It can be written as a sum of positive squares in only one way, i.e., 32416922209 + 8473754809 = 180047^2 + 92053^2 .

It is not an unprimeable number, because it can be changed into a prime (40890677017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222669253 + ... + 10222669256.

Almost surely, 2^40890677018 is an apocalyptic number.

40890677018 is a deficient number, since it is larger than the sum of its proper divisors (20445338512).

40890677018 is a wasteful number, since it uses less digits than its factorization.

40890677018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20445338511.

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 40890677018 in words is "forty billion, eight hundred ninety million, six hundred seventy-seven thousand, eighteen".