145898657687 has 4 divisors (see below), whose sum is σ = 145909335696. Its totient is φ = 145887979680.

The previous prime is 145898657657. The next prime is 145898657701. The reversal of 145898657687 is 786756898541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786756898541 = 604613 ⋅1301257.

It is a cyclic number.

It is not a de Polignac number, because 145898657687 - 2¹⁰ = 145898656663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145898657627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5318483 + ... + 5345844.

It is an arithmetic number, because the mean of its divisors is an integer number (36477333924).

Almost surely, 2^145898657687 is an apocalyptic number.

145898657687 is a deficient number, since it is larger than the sum of its proper divisors (10678009).

145898657687 is a wasteful number, since it uses less digits than its factorization.

145898657687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10678008.

The product of its digits is 812851200, while the sum is 74.

The spelling of 145898657687 in words is "one hundred forty-five billion, eight hundred ninety-eight million, six hundred fifty-seven thousand, six hundred eighty-seven".