645103316160 has 168 divisors, whose sum is σ = 2227326060960. Its totient is φ = 171373252608.

The previous prime is 645103316159. The next prime is 645103316161. The reversal of 645103316160 is 61613301546.

645103316160 is a `hidden beast` number, since 6 + 4 + 5 + 1 + 0 + 3 + 31 + 616 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (645103316159) and next prime (645103316161).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (645103316161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331596 + ... + 1183284.

It is an arithmetic number, because the mean of its divisors is an integer number (13257893220).

Almost surely, 2^645103316160 is an apocalyptic number.

645103316160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645103316160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1113663030480).

645103316160 is an abundant number, since it is smaller than the sum of its proper divisors (1582222744800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645103316160 is a wasteful number, since it uses less digits than its factorization.

645103316160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851975 (or 851962 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 645103316160 in words is "six hundred forty-five billion, one hundred three million, three hundred sixteen thousand, one hundred sixty".