645542526033008 has 40 divisors (see below), whose sum is σ = 1251174923905920. Its totient is φ = 322658686022400.

The previous prime is 645542526032969. The next prime is 645542526033011. The reversal of 645542526033008 is 800330625245546.

It is a super-2 number, since 2×645542526033008² (a number of 30 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 7 ways as a sum of consecutive naturals, for example, 939172658 + ... + 939859758.

It is an arithmetic number, because the mean of its divisors is an integer number (31279373097648).

Almost surely, 2^{645542526033008} is an apocalyptic number.

It is an amenable number.

645542526033008 is a deficient number, since it is larger than the sum of its proper divisors (605632397872912).

645542526033008 is a wasteful number, since it uses less digits than its factorization.

645542526033008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707505 (or 707499 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 53.

The spelling of 645542526033008 in words is "six hundred forty-five trillion, five hundred forty-two billion, five hundred twenty-six million, thirty-three thousand, eight".