3900448915247 has 4 divisors (see below), whose sum is σ = 4105735700280. Its totient is φ = 3695162130216.

The previous prime is 3900448915199. The next prime is 3900448915277. The reversal of 3900448915247 is 7425198440093.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3900448915247 - 2²⁸ = 3900180479791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3900448915192 and 3900448915201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900448915277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102643392488 + ... + 102643392525.

It is an arithmetic number, because the mean of its divisors is an integer number (1026433925070).

Almost surely, 2^{3900448915247} is an apocalyptic number.

3900448915247 is a deficient number, since it is larger than the sum of its proper divisors (205286785033).

3900448915247 is a wasteful number, since it uses less digits than its factorization.

3900448915247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205286785032.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 3900448915247 in words is "three trillion, nine hundred billion, four hundred forty-eight million, nine hundred fifteen thousand, two hundred forty-seven".