387391128769 has 16 divisors (see below), whose sum is σ = 414468508608. Its totient is φ = 360791488512.

The previous prime is 387391128703. The next prime is 387391128781. The reversal of 387391128769 is 967821193783.

It is not a de Polignac number, because 387391128769 - 2¹⁹ = 387390604481 is a prime.

It is a super-2 number, since 2×387391128769² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 387391128769.

It is not an unprimeable number, because it can be changed into a prime (387391428769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15295014 + ... + 15320320.

It is an arithmetic number, because the mean of its divisors is an integer number (25904281788).

Almost surely, 2^387391128769 is an apocalyptic number.

It is an amenable number.

387391128769 is a deficient number, since it is larger than the sum of its proper divisors (27077379839).

387391128769 is a wasteful number, since it uses less digits than its factorization.

387391128769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34704.

The product of its digits is 27433728, while the sum is 64.

The spelling of 387391128769 in words is "three hundred eighty-seven billion, three hundred ninety-one million, one hundred twenty-eight thousand, seven hundred sixty-nine".