2815541445901 has 4 divisors (see below), whose sum is σ = 2981161530972. Its totient is φ = 2649921360832.

The previous prime is 2815541445889. The next prime is 2815541445907. The reversal of 2815541445901 is 1095441455182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 897995035876 + 1917546410025 = 947626^2 + 1384755^2 .

It is a cyclic number.

It is not a de Polignac number, because 2815541445901 - 2²⁷ = 2815407228173 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815541445907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82810042510 + ... + 82810042543.

It is an arithmetic number, because the mean of its divisors is an integer number (745290382743).

Almost surely, 2^{2815541445901} is an apocalyptic number.

It is an amenable number.

2815541445901 is a deficient number, since it is larger than the sum of its proper divisors (165620085071).

2815541445901 is a wasteful number, since it uses less digits than its factorization.

2815541445901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165620085070.

The product of its (nonzero) digits is 1152000, while the sum is 49.

The spelling of 2815541445901 in words is "two trillion, eight hundred fifteen billion, five hundred forty-one million, four hundred forty-five thousand, nine hundred one".