145855540821 has 8 divisors (see below), whose sum is σ = 194526165280. Its totient is φ = 97210971792.

The previous prime is 145855540801. The next prime is 145855540829. The reversal of 145855540821 is 128045558541.

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

It is not a de Polignac number, because 145855540821 - 2¹³ = 145855532629 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 (145855540829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6500791 + ... + 6523188.

It is an arithmetic number, because the mean of its divisors is an integer number (24315770660).

Almost surely, 2^145855540821 is an apocalyptic number.

It is an amenable number.

145855540821 is a deficient number, since it is larger than the sum of its proper divisors (48670624459).

145855540821 is a wasteful number, since it uses less digits than its factorization.

145855540821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13027715.

The product of its (nonzero) digits is 1280000, while the sum is 48.

The spelling of 145855540821 in words is "one hundred forty-five billion, eight hundred fifty-five million, five hundred forty thousand, eight hundred twenty-one".