40591672493 has 2 divisors, whose sum is σ = 40591672494. Its totient is φ = 40591672492.

The previous prime is 40591672427. The next prime is 40591672543. The reversal of 40591672493 is 39427619504.

It is an a-pointer prime, because the next prime (40591672543) can be obtained adding 40591672493 to its sum of digits (50).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32404680169 + 8186992324 = 180013^2 + 90482^2 .

It is a cyclic number.

It is not a de Polignac number, because 40591672493 - 2²⁰ = 40590623917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40591672403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20295836246 + 20295836247.

It is an arithmetic number, because the mean of its divisors is an integer number (20295836247).

Almost surely, 2^40591672493 is an apocalyptic number.

It is an amenable number.

40591672493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40591672493 is an equidigital number, since it uses as much as digits as its factorization.

40591672493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 40591672493 in words is "forty billion, five hundred ninety-one million, six hundred seventy-two thousand, four hundred ninety-three".