387891411649 has 16 divisors (see below), whose sum is σ = 450370354176. Its totient is φ = 327196069200.

The previous prime is 387891411643. The next prime is 387891411653. The reversal of 387891411649 is 946114198783.

It is not a de Polignac number, because 387891411649 - 2⁹ = 387891411137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387891411643) 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, 441547 + ... + 985264.

It is an arithmetic number, because the mean of its divisors is an integer number (28148147136).

Almost surely, 2^387891411649 is an apocalyptic number.

It is an amenable number.

387891411649 is a deficient number, since it is larger than the sum of its proper divisors (62478942527).

387891411649 is a wasteful number, since it uses less digits than its factorization.

387891411649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427436.

The product of its digits is 10450944, while the sum is 61.

The spelling of 387891411649 in words is "three hundred eighty-seven billion, eight hundred ninety-one million, four hundred eleven thousand, six hundred forty-nine".