145885821688 has 32 divisors (see below), whose sum is σ = 282700656000. Its totient is φ = 70504663680.

The previous prime is 145885821673. The next prime is 145885821707. The reversal of 145885821688 is 886128588541.

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, 149203 + ... + 560386.

It is an arithmetic number, because the mean of its divisors is an integer number (8834395500).

Almost surely, 2^145885821688 is an apocalyptic number.

It is an amenable number.

145885821688 is a deficient number, since it is larger than the sum of its proper divisors (136814834312).

145885821688 is a wasteful number, since it uses less digits than its factorization.

145885821688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710455 (or 710451 counting only the distinct ones).

The product of its digits is 39321600, while the sum is 64.

The spelling of 145885821688 in words is "one hundred forty-five billion, eight hundred eighty-five million, eight hundred twenty-one thousand, six hundred eighty-eight".