40972239449 has 4 divisors (see below), whose sum is σ = 41432601780. Its totient is φ = 40511877120.

The previous prime is 40972239443. The next prime is 40972239479. The reversal of 40972239449 is 94493227904.

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 5569935424 + 35402304025 = 74632^2 + 188155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40972239449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40972239449.

It is not an unprimeable number, because it can be changed into a prime (40972239443) 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, 230181032 + ... + 230181209.

It is an arithmetic number, because the mean of its divisors is an integer number (10358150445).

Almost surely, 2^40972239449 is an apocalyptic number.

It is an amenable number.

40972239449 is a deficient number, since it is larger than the sum of its proper divisors (460362331).

40972239449 is an equidigital number, since it uses as much as digits as its factorization.

40972239449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460362330.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 40972239449 in words is "forty billion, nine hundred seventy-two million, two hundred thirty-nine thousand, four hundred forty-nine".