645635251350 has 36 divisors (see below), whose sum is σ = 1734606709836. Its totient is φ = 172169400240.

The previous prime is 645635251337. The next prime is 645635251351. The reversal of 645635251350 is 53152536546.

645635251350 is a `hidden beast` number, since 6 + 4 + 5 + 63 + 525 + 13 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 645635251296 and 645635251305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645635251351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 717372052 + ... + 717372951.

Almost surely, 2^645635251350 is an apocalyptic number.

645635251350 is an abundant number, since it is smaller than the sum of its proper divisors (1088971458486).

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

645635251350 is a wasteful number, since it uses less digits than its factorization.

645635251350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434745021 (or 1434745013 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 45.

Adding to 645635251350 its reverse (53152536546), we get a palindrome (698787787896).

The spelling of 645635251350 in words is "six hundred forty-five billion, six hundred thirty-five million, two hundred fifty-one thousand, three hundred fifty".