1538716948709 has 16 divisors (see below), whose sum is σ = 1550894814720. Its totient is φ = 1526582453760.

The previous prime is 1538716948649. The next prime is 1538716948739. The reversal of 1538716948709 is 9078496178351.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1538716948709 is a prime.

It is a Smith number, since the sum of its digits (68) 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 (1538716948739) 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, 203503289 + ... + 203510849.

It is an arithmetic number, because the mean of its divisors is an integer number (96930925920).

Almost surely, 2^{1538716948709} is an apocalyptic number.

It is an amenable number.

1538716948709 is a deficient number, since it is larger than the sum of its proper divisors (12177866011).

1538716948709 is a wasteful number, since it uses less digits than its factorization.

1538716948709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220.

The product of its (nonzero) digits is 91445760, while the sum is 68.

The spelling of 1538716948709 in words is "one trillion, five hundred thirty-eight billion, seven hundred sixteen million, nine hundred forty-eight thousand, seven hundred nine".