40354005257 has 4 divisors (see below), whose sum is σ = 40356922116. Its totient is φ = 40351088400.

The previous prime is 40354005203. The next prime is 40354005259. The reversal of 40354005257 is 75250045304.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30191147536 + 10162857721 = 173756^2 + 100811^2 .

It is a cyclic number.

It is not a de Polignac number, because 40354005257 - 2²² = 40349810953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40354005259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1437578 + ... + 1465379.

It is an arithmetic number, because the mean of its divisors is an integer number (10089230529).

Almost surely, 2^40354005257 is an apocalyptic number.

It is an amenable number.

40354005257 is a deficient number, since it is larger than the sum of its proper divisors (2916859).

40354005257 is a wasteful number, since it uses less digits than its factorization.

40354005257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916858.

The product of its (nonzero) digits is 84000, while the sum is 35.

The spelling of 40354005257 in words is "forty billion, three hundred fifty-four million, five thousand, two hundred fifty-seven".