78190027105 has 16 divisors (see below), whose sum is σ = 93967148880. Its totient is φ = 62459347968.

The previous prime is 78190027087. The next prime is 78190027147. The reversal of 78190027105 is 50172009187.

It can be written as a sum of positive squares in 8 ways, for example, as 10377700641 + 67812326464 = 101871^2 + 260408^2 .

It is a cyclic number.

It is not a de Polignac number, because 78190027105 - 2⁵ = 78190027073 is a prime.

It is a super-3 number, since 3×78190027105³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19898781 + ... + 19902709.

It is an arithmetic number, because the mean of its divisors is an integer number (5872946805).

Almost surely, 2^78190027105 is an apocalyptic number.

It is an amenable number.

78190027105 is a deficient number, since it is larger than the sum of its proper divisors (15777121775).

78190027105 is a wasteful number, since it uses less digits than its factorization.

78190027105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820.

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 78190027105 in words is "seventy-eight billion, one hundred ninety million, twenty-seven thousand, one hundred five".