78838552454487 has 16 divisors (see below), whose sum is σ = 120135063581952. Its totient is φ = 45050553961920.

The previous prime is 78838552454447. The next prime is 78838552454503. The reversal of 78838552454487 is 78445425583887.

It is a happy number.

It is not a de Polignac number, because 78838552454487 - 2¹⁵ = 78838552421719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78838552454437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32109643 + ... + 34477619.

It is an arithmetic number, because the mean of its divisors is an integer number (7508441473872).

Almost surely, 2^{78838552454487} is an apocalyptic number.

78838552454487 is a deficient number, since it is larger than the sum of its proper divisors (41296511127465).

78838552454487 is a wasteful number, since it uses less digits than its factorization.

78838552454487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3953398.

The product of its digits is 9633792000, while the sum is 78.

The spelling of 78838552454487 in words is "seventy-eight trillion, eight hundred thirty-eight billion, five hundred fifty-two million, four hundred fifty-four thousand, four hundred eighty-seven".