145719357521 has 16 divisors (see below), whose sum is σ = 156940027200. Its totient is φ = 134794019328.

The previous prime is 145719357503. The next prime is 145719357527. The reversal of 145719357521 is 125753917541.

It is a cyclic number.

It is not a de Polignac number, because 145719357521 - 2⁶ = 145719357457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145719357521.

It is not an unprimeable number, because it can be changed into a prime (145719357527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5663141 + ... + 5688813.

It is an arithmetic number, because the mean of its divisors is an integer number (9808751700).

Almost surely, 2^145719357521 is an apocalyptic number.

It is an amenable number.

145719357521 is a deficient number, since it is larger than the sum of its proper divisors (11220669679).

145719357521 is a wasteful number, since it uses less digits than its factorization.

145719357521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31408.

The product of its digits is 1323000, while the sum is 50.

The spelling of 145719357521 in words is "one hundred forty-five billion, seven hundred nineteen million, three hundred fifty-seven thousand, five hundred twenty-one".