40452031861 has 6 divisors (see below), whose sum is σ = 41414656470. Its totient is φ = 39511285128.

The previous prime is 40452031853. The next prime is 40452031877. The reversal of 40452031861 is 16813025404.

It can be written as a sum of positive squares in only one way, i.e., 31584042961 + 8867988900 = 177719^2 + 94170^2 .

It is not a de Polignac number, because 40452031861 - 2³ = 40452031853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40452031801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10937046 + ... + 10940743.

It is an arithmetic number, because the mean of its divisors is an integer number (6902442745).

Almost surely, 2^40452031861 is an apocalyptic number.

It is an amenable number.

40452031861 is a deficient number, since it is larger than the sum of its proper divisors (962624609).

40452031861 is an equidigital number, since it uses as much as digits as its factorization.

40452031861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21877875 (or 21877832 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 40452031861 in words is "forty billion, four hundred fifty-two million, thirty-one thousand, eight hundred sixty-one".