840227825657 has 6 divisors (see below), whose sum is σ = 923556205194. Its totient is φ = 763843477760.

The previous prime is 840227825651. The next prime is 840227825663. The reversal of 840227825657 is 756528722048.

It is an interprime number because it is at equal distance from previous prime (840227825651) and next prime (840227825663).

It can be written as a sum of positive squares in only one way, i.e., 736994778256 + 103233047401 = 858484^2 + 321299^2 .

It is not a de Polignac number, because 840227825657 - 2¹² = 840227821561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840227825651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3472015688 + ... + 3472015929.

It is an arithmetic number, because the mean of its divisors is an integer number (153926034199).

Almost surely, 2^840227825657 is an apocalyptic number.

It is an amenable number.

840227825657 is a deficient number, since it is larger than the sum of its proper divisors (83328379537).

840227825657 is a wasteful number, since it uses less digits than its factorization.

840227825657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6944031639 (or 6944031628 counting only the distinct ones).

The product of its (nonzero) digits is 15052800, while the sum is 56.

The spelling of 840227825657 in words is "eight hundred forty billion, two hundred twenty-seven million, eight hundred twenty-five thousand, six hundred fifty-seven".