40632971920889 has 4 divisors (see below), whose sum is σ = 40639610216820. Its totient is φ = 40626333624960.

The previous prime is 40632971920873. The next prime is 40632971920927. The reversal of 40632971920889 is 98802917923604.

It is a happy number.

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 23965283839225 + 16667688081664 = 4895435^2 + 4082608^2 .

It is a cyclic number.

It is not a de Polignac number, because 40632971920889 - 2⁴ = 40632971920873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40632971929889) 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, 3319138784 + ... + 3319151025.

It is an arithmetic number, because the mean of its divisors is an integer number (10159902554205).

Almost surely, 2^{40632971920889} is an apocalyptic number.

It is an amenable number.

40632971920889 is a deficient number, since it is larger than the sum of its proper divisors (6638295931).

40632971920889 is an equidigital number, since it uses as much as digits as its factorization.

40632971920889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6638295930.

The product of its (nonzero) digits is 94058496, while the sum is 68.

The spelling of 40632971920889 in words is "forty trillion, six hundred thirty-two billion, nine hundred seventy-one million, nine hundred twenty thousand, eight hundred eighty-nine".