40121236587 has 4 divisors (see below), whose sum is σ = 53494982120. Its totient is φ = 26747491056.

The previous prime is 40121236567. The next prime is 40121236591. The reversal of 40121236587 is 78563212104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40121236587 - 2⁷ = 40121236459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40121236567) 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, 6686872762 + ... + 6686872767.

It is an arithmetic number, because the mean of its divisors is an integer number (13373745530).

Almost surely, 2^40121236587 is an apocalyptic number.

40121236587 is a deficient number, since it is larger than the sum of its proper divisors (13373745533).

40121236587 is a wasteful number, since it uses less digits than its factorization.

40121236587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13373745532.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 40121236587 in words is "forty billion, one hundred twenty-one million, two hundred thirty-six thousand, five hundred eighty-seven".