40400550493 has 2 divisors, whose sum is σ = 40400550494. Its totient is φ = 40400550492.

The previous prime is 40400550469. The next prime is 40400550503. The reversal of 40400550493 is 39405500404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38646448569 + 1754101924 = 196587^2 + 41882^2 .

It is a cyclic number.

It is not a de Polignac number, because 40400550493 - 2²¹ = 40398453341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40400550403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200275246 + 20200275247.

It is an arithmetic number, because the mean of its divisors is an integer number (20200275247).

Almost surely, 2^40400550493 is an apocalyptic number.

It is an amenable number.

40400550493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400550493 is an equidigital number, since it uses as much as digits as its factorization.

40400550493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 40400550493 in words is "forty billion, four hundred million, five hundred fifty thousand, four hundred ninety-three".