645065622142 has 32 divisors (see below), whose sum is σ = 1020992428800. Its totient is φ = 304817551488.

The previous prime is 645065622101. The next prime is 645065622151. The reversal of 645065622142 is 241226560546.

It is a happy number.

It is a super-2 number, since 2×645065622142² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71965353 + ... + 71974315.

It is an arithmetic number, because the mean of its divisors is an integer number (31906013400).

Almost surely, 2^645065622142 is an apocalyptic number.

645065622142 is a deficient number, since it is larger than the sum of its proper divisors (375926806658).

645065622142 is a wasteful number, since it uses less digits than its factorization.

645065622142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 645065622142 in words is "six hundred forty-five billion, sixty-five million, six hundred twenty-two thousand, one hundred forty-two".