127890416515 has 4 divisors (see below), whose sum is σ = 153468499824. Its totient is φ = 102312333208.

The previous prime is 127890416503. The next prime is 127890416567. The reversal of 127890416515 is 515614098721.

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 127890416515 - 2⁵ = 127890416483 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12789041647 + ... + 12789041656.

It is an arithmetic number, because the mean of its divisors is an integer number (38367124956).

Almost surely, 2^127890416515 is an apocalyptic number.

127890416515 is a deficient number, since it is larger than the sum of its proper divisors (25578083309).

127890416515 is an equidigital number, since it uses as much as digits as its factorization.

127890416515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25578083308.

The product of its (nonzero) digits is 604800, while the sum is 49.

The spelling of 127890416515 in words is "one hundred twenty-seven billion, eight hundred ninety million, four hundred sixteen thousand, five hundred fifteen".