78469401617 has 4 divisors (see below), whose sum is σ = 78471909696. Its totient is φ = 78466893540.

The previous prime is 78469401607. The next prime is 78469401623. The reversal of 78469401617 is 71610496487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78469401617 - 2¹⁰ = 78469400593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78469401607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1206509 + ... + 1269882.

It is an arithmetic number, because the mean of its divisors is an integer number (19617977424).

Almost surely, 2^78469401617 is an apocalyptic number.

It is an amenable number.

78469401617 is a deficient number, since it is larger than the sum of its proper divisors (2508079).

78469401617 is a wasteful number, since it uses less digits than its factorization.

78469401617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508078.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 78469401617 in words is "seventy-eight billion, four hundred sixty-nine million, four hundred one thousand, six hundred seventeen".