78425414545 has 8 divisors (see below), whose sum is σ = 94334040360. Its totient is φ = 62591303040.

The previous prime is 78425414539. The next prime is 78425414567. The reversal of 78425414545 is 54541452487.

It can be written as a sum of positive squares in 4 ways, for example, as 3717218961 + 74708195584 = 60969^2 + 273328^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78425414545 - 2²³ = 78417025937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18626260 + ... + 18630469.

It is an arithmetic number, because the mean of its divisors is an integer number (11791755045).

Almost surely, 2^78425414545 is an apocalyptic number.

It is an amenable number.

78425414545 is a deficient number, since it is larger than the sum of its proper divisors (15908625815).

78425414545 is a wasteful number, since it uses less digits than its factorization.

78425414545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37257155.

The product of its digits is 3584000, while the sum is 49.

The spelling of 78425414545 in words is "seventy-eight billion, four hundred twenty-five million, four hundred fourteen thousand, five hundred forty-five".