40251443455 has 4 divisors (see below), whose sum is σ = 48301732152. Its totient is φ = 32201154760.

The previous prime is 40251443447. The next prime is 40251443459. The reversal of 40251443455 is 55434415204.

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

It is not a de Polignac number, because 40251443455 - 2³ = 40251443447 is a prime.

It is a super-2 number, since 2×40251443455² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40251443459) 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, 4025144341 + ... + 4025144350.

It is an arithmetic number, because the mean of its divisors is an integer number (12075433038).

Almost surely, 2^40251443455 is an apocalyptic number.

40251443455 is a deficient number, since it is larger than the sum of its proper divisors (8050288697).

40251443455 is an equidigital number, since it uses as much as digits as its factorization.

40251443455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050288696.

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 40251443455 its reverse (55434415204), we get a palindrome (95685858659).

The spelling of 40251443455 in words is "forty billion, two hundred fifty-one million, four hundred forty-three thousand, four hundred fifty-five".