387615480491 has 4 divisors (see below), whose sum is σ = 388154584800. Its totient is φ = 387076376184.

The previous prime is 387615480467. The next prime is 387615480503. The reversal of 387615480491 is 194084516783.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387615480491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387615480431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269551076 + ... + 269552513.

It is an arithmetic number, because the mean of its divisors is an integer number (97038646200).

Almost surely, 2^387615480491 is an apocalyptic number.

387615480491 is a deficient number, since it is larger than the sum of its proper divisors (539104309).

387615480491 is an equidigital number, since it uses as much as digits as its factorization.

387615480491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539104308.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 387615480491 in words is "three hundred eighty-seven billion, six hundred fifteen million, four hundred eighty thousand, four hundred ninety-one".