40918011971 has 4 divisors (see below), whose sum is σ = 40996549944. Its totient is φ = 40839474000.

The previous prime is 40918011961. The next prime is 40918011983. The reversal of 40918011971 is 17911081904.

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

It is a cyclic number.

It is not a de Polignac number, because 40918011971 - 2¹⁸ = 40917749827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40918011961) 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, 39268205 + ... + 39269246.

It is an arithmetic number, because the mean of its divisors is an integer number (10249137486).

Almost surely, 2^40918011971 is an apocalyptic number.

40918011971 is a deficient number, since it is larger than the sum of its proper divisors (78537973).

40918011971 is an equidigital number, since it uses as much as digits as its factorization.

40918011971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78537972.

The product of its (nonzero) digits is 18144, while the sum is 41.

The spelling of 40918011971 in words is "forty billion, nine hundred eighteen million, eleven thousand, nine hundred seventy-one".