645634354025 has 12 divisors (see below), whose sum is σ = 842722736400. Its totient is φ = 489322878480.

The previous prime is 645634354019. The next prime is 645634354037. The reversal of 645634354025 is 520453436546.

It is not a de Polignac number, because 645634354025 - 2¹² = 645634349929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 679614635 + ... + 679615584.

It is an arithmetic number, because the mean of its divisors is an integer number (70226894700).

Almost surely, 2^645634354025 is an apocalyptic number.

It is an amenable number.

645634354025 is a deficient number, since it is larger than the sum of its proper divisors (197088382375).

645634354025 is a wasteful number, since it uses less digits than its factorization.

645634354025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359230248 (or 1359230243 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 47.

The spelling of 645634354025 in words is "six hundred forty-five billion, six hundred thirty-four million, three hundred fifty-four thousand, twenty-five".