645235463248 has 20 divisors (see below), whose sum is σ = 1283931379060. Its totient is φ = 313898333184.

The previous prime is 645235463189. The next prime is 645235463263. The reversal of 645235463248 is 842364532546.

It can be written as a sum of positive squares in 2 ways, for example, as 430766443584 + 214469019664 = 656328^2 + 463108^2 .

It is a super-2 number, since 2×645235463248² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645235463195 and 645235463204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544961793 + ... + 544962976.

It is an arithmetic number, because the mean of its divisors is an integer number (64196568953).

Almost surely, 2^645235463248 is an apocalyptic number.

It is an amenable number.

645235463248 is a deficient number, since it is larger than the sum of its proper divisors (638695915812).

645235463248 is a wasteful number, since it uses less digits than its factorization.

645235463248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089924814 (or 1089924808 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 52.

The spelling of 645235463248 in words is "six hundred forty-five billion, two hundred thirty-five million, four hundred sixty-three thousand, two hundred forty-eight".