40851989161 has 4 divisors (see below), whose sum is σ = 40855105872. Its totient is φ = 40848872452.

The previous prime is 40851989147. The next prime is 40851989177. The reversal of 40851989161 is 16198915804.

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 a cyclic number.

It is not a de Polignac number, because 40851989161 - 2¹³ = 40851980969 is a prime.

It is a super-2 number, since 2×40851989161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40851989099 and 40851989108.

It is not an unprimeable number, because it can be changed into a prime (40851989461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538611 + ... + 1564936.

It is an arithmetic number, because the mean of its divisors is an integer number (10213776468).

Almost surely, 2^40851989161 is an apocalyptic number.

It is an amenable number.

40851989161 is a deficient number, since it is larger than the sum of its proper divisors (3116711).

40851989161 is a wasteful number, since it uses less digits than its factorization.

40851989161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3116710.

The product of its (nonzero) digits is 622080, while the sum is 52.

The spelling of 40851989161 in words is "forty billion, eight hundred fifty-one million, nine hundred eighty-nine thousand, one hundred sixty-one".