211040696595457 has 4 divisors (see below), whose sum is σ = 211502492430916. Its totient is φ = 210578900760000.

The previous prime is 211040696595409. The next prime is 211040696595481. The reversal of 211040696595457 is 754595696040112.

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 128033728409601 + 83006968185856 = 11315199^2 + 9110816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211040696595457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211040696595857) 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, 230897917044 + ... + 230897917957.

It is an arithmetic number, because the mean of its divisors is an integer number (52875623107729).

Almost surely, 2^{211040696595457} is an apocalyptic number.

It is an amenable number.

211040696595457 is a deficient number, since it is larger than the sum of its proper divisors (461795835459).

211040696595457 is an equidigital number, since it uses as much as digits as its factorization.

211040696595457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461795835458.

The product of its (nonzero) digits is 81648000, while the sum is 64.

The spelling of 211040696595457 in words is "two hundred eleven trillion, forty billion, six hundred ninety-six million, five hundred ninety-five thousand, four hundred fifty-seven".