645561466350 has 24 divisors (see below), whose sum is σ = 1600992436920. Its totient is φ = 172149724320.

The previous prime is 645561466337. The next prime is 645561466357. The reversal of 645561466350 is 53664165546.

It is a junction number, because it is equal to n+sod(n) for n = 645561466293 and 645561466302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645561466357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2151871405 + ... + 2151871704.

It is an arithmetic number, because the mean of its divisors is an integer number (66708018205).

Almost surely, 2^645561466350 is an apocalyptic number.

645561466350 is an abundant number, since it is smaller than the sum of its proper divisors (955430970570).

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

645561466350 is a wasteful number, since it uses less digits than its factorization.

645561466350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303743124 (or 4303743119 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 645561466350 in words is "six hundred forty-five billion, five hundred sixty-one million, four hundred sixty-six thousand, three hundred fifty".