78285605399 has 8 divisors (see below), whose sum is σ = 82464414000. Its totient is φ = 74112648192.

The previous prime is 78285605383. The next prime is 78285605443. The reversal of 78285605399 is 99350658287.

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 78285605399 - 2⁴ = 78285605383 is a prime.

It is a super-2 number, since 2×78285605399² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78285601399) 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, 1435364 + ... + 1488905.

It is an arithmetic number, because the mean of its divisors is an integer number (10308051750).

Almost surely, 2^78285605399 is an apocalyptic number.

78285605399 is a deficient number, since it is larger than the sum of its proper divisors (4178808601).

78285605399 is a wasteful number, since it uses less digits than its factorization.

78285605399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925697.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 78285605399 in words is "seventy-eight billion, two hundred eighty-five million, six hundred five thousand, three hundred ninety-nine".