154221006565 has 32 divisors (see below), whose sum is σ = 198966087936. Its totient is φ = 114468119040.

The previous prime is 154221006503. The next prime is 154221006587. The reversal of 154221006565 is 565600122451.

It is not a de Polignac number, because 154221006565 - 2³³ = 145631071973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 721162 + ... + 910228.

It is an arithmetic number, because the mean of its divisors is an integer number (6217690248).

Almost surely, 2^154221006565 is an apocalyptic number.

It is an amenable number.

154221006565 is a deficient number, since it is larger than the sum of its proper divisors (44745081371).

154221006565 is a wasteful number, since it uses less digits than its factorization.

154221006565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189309.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 154221006565 in words is "one hundred fifty-four billion, two hundred twenty-one million, six thousand, five hundred sixty-five".