845651644 has 6 divisors (see below), whose sum is σ = 1479890384. Its totient is φ = 422825820.

The previous prime is 845651641. The next prime is 845651647. The reversal of 845651644 is 446156548.

It is an interprime number because it is at equal distance from previous prime (845651641) and next prime (845651647).

It is a self number, because there is not a number n which added to its sum of digits gives 845651644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845651641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105706452 + ... + 105706459.

Almost surely, 2^845651644 is an apocalyptic number.

It is an amenable number.

845651644 is a deficient number, since it is larger than the sum of its proper divisors (634238740).

845651644 is a wasteful number, since it uses less digits than its factorization.

845651644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211412915 (or 211412913 counting only the distinct ones).

The product of its digits is 460800, while the sum is 43.

The square root of 845651644 is about 29080.0901649221. The cubic root of 845651644 is about 945.6501573706.

The spelling of 845651644 in words is "eight hundred forty-five million, six hundred fifty-one thousand, six hundred forty-four".