1385860448721 has 16 divisors (see below), whose sum is σ = 2113438515200. Its totient is φ = 791301069648.

The previous prime is 1385860448717. The next prime is 1385860448759. The reversal of 1385860448721 is 1278440685831.

It is not a de Polignac number, because 1385860448721 - 2² = 1385860448717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385860448771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25771951 + ... + 25825668.

It is an arithmetic number, because the mean of its divisors is an integer number (132089907200).

Almost surely, 2^{1385860448721} is an apocalyptic number.

It is an amenable number.

1385860448721 is a deficient number, since it is larger than the sum of its proper divisors (727578066479).

1385860448721 is a wasteful number, since it uses less digits than its factorization.

1385860448721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51598908.

The product of its (nonzero) digits is 10321920, while the sum is 57.

The spelling of 1385860448721 in words is "one trillion, three hundred eighty-five billion, eight hundred sixty million, four hundred forty-eight thousand, seven hundred twenty-one".