3728780878273 has 32 divisors (see below), whose sum is σ = 4257707950080. Its totient is φ = 3232429210560.

The previous prime is 3728780878253. The next prime is 3728780878279.

It is a happy number.

3728780878273 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-3728780878273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3728780878279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217197736 + ... + 217214902.

It is an arithmetic number, because the mean of its divisors is an integer number (133053373440).

Almost surely, 2^{3728780878273} is an apocalyptic number.

It is an amenable number.

3728780878273 is a deficient number, since it is larger than the sum of its proper divisors (528927071807).

3728780878273 is a wasteful number, since it uses less digits than its factorization.

3728780878273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19797.

The product of its (nonzero) digits is 354041856, while the sum is 70.

The spelling of 3728780878273 in words is "three trillion, seven hundred twenty-eight billion, seven hundred eighty million, eight hundred seventy-eight thousand, two hundred seventy-three".