40784657843 has 2 divisors, whose sum is σ = 40784657844. Its totient is φ = 40784657842.

The previous prime is 40784657821. The next prime is 40784657861. The reversal of 40784657843 is 34875648704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40784657843 - 2¹⁸ = 40784395699 is a prime.

It is not a weakly prime, because it can be changed into another prime (40784657743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20392328921 + 20392328922.

It is an arithmetic number, because the mean of its divisors is an integer number (20392328922).

Almost surely, 2^40784657843 is an apocalyptic number.

40784657843 is a deficient number, since it is larger than the sum of its proper divisors (1).

40784657843 is an equidigital number, since it uses as much as digits as its factorization.

40784657843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18063360, while the sum is 56.

The spelling of 40784657843 in words is "forty billion, seven hundred eighty-four million, six hundred fifty-seven thousand, eight hundred forty-three".