40348625857 has 4 divisors (see below), whose sum is σ = 40353310420. Its totient is φ = 40343941296.

The previous prime is 40348625813. The next prime is 40348625879. The reversal of 40348625857 is 75852684304.

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 25856318401 + 14492307456 = 160799^2 + 120384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40348625857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40348625557) 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 in 3 ways as a sum of consecutive naturals, for example, 2329338 + ... + 2346595.

It is an arithmetic number, because the mean of its divisors is an integer number (10088327605).

Almost surely, 2^40348625857 is an apocalyptic number.

It is an amenable number.

40348625857 is a deficient number, since it is larger than the sum of its proper divisors (4684563).

40348625857 is an equidigital number, since it uses as much as digits as its factorization.

40348625857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684562.

The product of its (nonzero) digits is 6451200, while the sum is 52.

The spelling of 40348625857 in words is "forty billion, three hundred forty-eight million, six hundred twenty-five thousand, eight hundred fifty-seven".