40651145881 has 4 divisors (see below), whose sum is σ = 40672667700. Its totient is φ = 40629624064.

The previous prime is 40651145861. The next prime is 40651145891. The reversal of 40651145881 is 18854115604.

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 12245414281 + 28405731600 = 110659^2 + 168540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40651145881 is a prime.

It is a super-2 number, since 2×40651145881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40651145851) 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, 10758076 + ... + 10761853.

It is an arithmetic number, because the mean of its divisors is an integer number (10168166925).

Almost surely, 2^40651145881 is an apocalyptic number.

It is an amenable number.

40651145881 is a deficient number, since it is larger than the sum of its proper divisors (21521819).

40651145881 is a wasteful number, since it uses less digits than its factorization.

40651145881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21521818.

The product of its (nonzero) digits is 153600, while the sum is 43.

The spelling of 40651145881 in words is "forty billion, six hundred fifty-one million, one hundred forty-five thousand, eight hundred eighty-one".