78487171357 has 8 divisors (see below), whose sum is σ = 90354367296. Its totient is φ = 66783661152.

The previous prime is 78487171339. The next prime is 78487171381. The reversal of 78487171357 is 75317178487.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78487171357 - 2¹¹ = 78487169309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78487171387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40920403 + ... + 40922320.

It is an arithmetic number, because the mean of its divisors is an integer number (11294295912).

Almost surely, 2^78487171357 is an apocalyptic number.

It is an amenable number.

78487171357 is a deficient number, since it is larger than the sum of its proper divisors (11867195939).

78487171357 is a wasteful number, since it uses less digits than its factorization.

78487171357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81842867.

The product of its digits is 9219840, while the sum is 58.

The spelling of 78487171357 in words is "seventy-eight billion, four hundred eighty-seven million, one hundred seventy-one thousand, three hundred fifty-seven".