78504134725545 has 16 divisors (see below), whose sum is σ = 125606867339520. Its totient is φ = 41868787927424.

The previous prime is 78504134725487. The next prime is 78504134725603. The reversal of 78504134725545 is 54552743140587.

It is an interprime number because it is at equal distance from previous prime (78504134725487) and next prime (78504134725603).

It is a cyclic number.

It is not a de Polignac number, because 78504134725545 - 2¹⁵ = 78504134692777 is a prime.

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, 2894701 + ... + 12860309.

It is an arithmetic number, because the mean of its divisors is an integer number (7850429208720).

Almost surely, 2^{78504134725545} is an apocalyptic number.

It is an amenable number.

78504134725545 is a deficient number, since it is larger than the sum of its proper divisors (47102732613975).

78504134725545 is a wasteful number, since it uses less digits than its factorization.

78504134725545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10490784.

The product of its (nonzero) digits is 94080000, while the sum is 60.

The spelling of 78504134725545 in words is "seventy-eight trillion, five hundred four billion, one hundred thirty-four million, seven hundred twenty-five thousand, five hundred forty-five".