78465553406385 has 32 divisors (see below), whose sum is σ = 128939827585152. Its totient is φ = 40716680002560.

The previous prime is 78465553406363. The next prime is 78465553406407. The reversal of 78465553406385 is 58360435556487.

It is an interprime number because it is at equal distance from previous prime (78465553406363) and next prime (78465553406407).

It is not a de Polignac number, because 78465553406385 - 2¹⁵ = 78465553373617 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39442650 + ... + 41384220.

It is an arithmetic number, because the mean of its divisors is an integer number (4029369612036).

Almost surely, 2^{78465553406385} is an apocalyptic number.

It is an amenable number.

78465553406385 is a deficient number, since it is larger than the sum of its proper divisors (50474274178767).

78465553406385 is a wasteful number, since it uses less digits than its factorization.

78465553406385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014433.

The product of its (nonzero) digits is 1451520000, while the sum is 69.

The spelling of 78465553406385 in words is "seventy-eight trillion, four hundred sixty-five billion, five hundred fifty-three million, four hundred six thousand, three hundred eighty-five".