145889336638 has 8 divisors (see below), whose sum is σ = 219039872688. Its totient is φ = 72876045744.

The previous prime is 145889336587. The next prime is 145889336687. The reversal of 145889336638 is 836633988541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 145889336638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34308631 + ... + 34312882.

It is an arithmetic number, because the mean of its divisors is an integer number (27379984086).

Almost surely, 2^145889336638 is an apocalyptic number.

145889336638 is a deficient number, since it is larger than the sum of its proper divisors (73150536050).

145889336638 is a wasteful number, since it uses less digits than its factorization.

145889336638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68622578.

The product of its digits is 89579520, while the sum is 64.

The spelling of 145889336638 in words is "one hundred forty-five billion, eight hundred eighty-nine million, three hundred thirty-six thousand, six hundred thirty-eight".