1391886621807 has 16 divisors (see below), whose sum is σ = 2024968078848. Its totient is φ = 843398599680.

The previous prime is 1391886621787. The next prime is 1391886621823. The reversal of 1391886621807 is 7081266881931.

It is not a de Polignac number, because 1391886621807 - 2⁸ = 1391886621551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391886621847) 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 15 ways as a sum of consecutive naturals, for example, 4058983 + ... + 4388520.

It is an arithmetic number, because the mean of its divisors is an integer number (126560504928).

Almost surely, 2^{1391886621807} is an apocalyptic number.

1391886621807 is a deficient number, since it is larger than the sum of its proper divisors (633081457041).

1391886621807 is a wasteful number, since it uses less digits than its factorization.

1391886621807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8452510.

The product of its (nonzero) digits is 6967296, while the sum is 60.

The spelling of 1391886621807 in words is "one trillion, three hundred ninety-one billion, eight hundred eighty-six million, six hundred twenty-one thousand, eight hundred seven".