20151544145 has 8 divisors (see below), whose sum is σ = 24190802304. Its totient is φ = 16115269104.

The previous prime is 20151544121. The next prime is 20151544199. The reversal of 20151544145 is 54144515102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20151544145 - 2⁶ = 20151544081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730889 + ... + 757958.

It is an arithmetic number, because the mean of its divisors is an integer number (3023850288).

Almost surely, 2^20151544145 is an apocalyptic number.

It is an amenable number.

20151544145 is a deficient number, since it is larger than the sum of its proper divisors (4039258159).

20151544145 is a wasteful number, since it uses less digits than its factorization.

20151544145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491559.

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 20151544145 in words is "twenty billion, one hundred fifty-one million, five hundred forty-four thousand, one hundred forty-five".