387881117515 has 8 divisors (see below), whose sum is σ = 476281930608. Its totient is φ = 303088500960.

The previous prime is 387881117509. The next prime is 387881117531. The reversal of 387881117515 is 515711188783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 387881117515 - 2¹⁷ = 387880986443 is a prime.

It is a super-2 number, since 2×387881117515² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 902048896 + ... + 902049325.

It is an arithmetic number, because the mean of its divisors is an integer number (59535241326).

Almost surely, 2^387881117515 is an apocalyptic number.

387881117515 is a deficient number, since it is larger than the sum of its proper divisors (88400813093).

387881117515 is a wasteful number, since it uses less digits than its factorization.

387881117515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804098269.

The product of its digits is 1881600, while the sum is 55.

The spelling of 387881117515 in words is "three hundred eighty-seven billion, eight hundred eighty-one million, one hundred seventeen thousand, five hundred fifteen".