40889692945 has 8 divisors (see below), whose sum is σ = 49553450280. Its totient is φ = 32387875200.

The previous prime is 40889692939. The next prime is 40889692979. The reversal of 40889692945 is 54929698804.

It is a Cunningham number, because it is equal to 202212²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 7550219664 + 33339473281 = 86892^2 + 182591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40889692945 - 2⁹ = 40889692433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40484340 + ... + 40485349.

It is an arithmetic number, because the mean of its divisors is an integer number (6194181285).

Almost surely, 2^40889692945 is an apocalyptic number.

It is an amenable number.

40889692945 is a deficient number, since it is larger than the sum of its proper divisors (8663757335).

40889692945 is a wasteful number, since it uses less digits than its factorization.

40889692945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80969795.

The product of its (nonzero) digits is 44789760, while the sum is 64.

The spelling of 40889692945 in words is "forty billion, eight hundred eighty-nine million, six hundred ninety-two thousand, nine hundred forty-five".