387777749011 has 4 divisors (see below), whose sum is σ = 398258228752. Its totient is φ = 377297269272.

The previous prime is 387777748997. The next prime is 387777749017. The reversal of 387777749011 is 110947777783.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 387777749011 - 2²³ = 387769360403 is a prime.

It is a super-2 number, since 2×387777749011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387777749017) 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 3 ways as a sum of consecutive naturals, for example, 5240239815 + ... + 5240239888.

It is an arithmetic number, because the mean of its divisors is an integer number (99564557188).

Almost surely, 2^387777749011 is an apocalyptic number.

387777749011 is a deficient number, since it is larger than the sum of its proper divisors (10480479741).

387777749011 is a wasteful number, since it uses less digits than its factorization.

387777749011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10480479740.

The product of its (nonzero) digits is 14521248, while the sum is 61.

The spelling of 387777749011 in words is "three hundred eighty-seven billion, seven hundred seventy-seven million, seven hundred forty-nine thousand, eleven".