645630017354 has 16 divisors (see below), whose sum is σ = 1133789299776. Its totient is φ = 269949832800.

The previous prime is 645630017339. The next prime is 645630017371. The reversal of 645630017354 is 453710036546.

It is a super-2 number, since 2×645630017354² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 562394912 + ... + 562396059.

It is an arithmetic number, because the mean of its divisors is an integer number (70861831236).

Almost surely, 2^645630017354 is an apocalyptic number.

645630017354 is a deficient number, since it is larger than the sum of its proper divisors (488159282422).

645630017354 is a wasteful number, since it uses less digits than its factorization.

645630017354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124791021.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 645630017354 in words is "six hundred forty-five billion, six hundred thirty million, seventeen thousand, three hundred fifty-four".