78285957406 has 32 divisors (see below), whose sum is σ = 126517697280. Its totient is φ = 36194906496.

The previous prime is 78285957403. The next prime is 78285957413. The reversal of 78285957406 is 60475958287.

It is a super-2 number, since 2×78285957406² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78285957401) 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, 3734751 + ... + 3755653.

It is an arithmetic number, because the mean of its divisors is an integer number (3953678040).

Almost surely, 2^78285957406 is an apocalyptic number.

78285957406 is a deficient number, since it is larger than the sum of its proper divisors (48231739874).

78285957406 is a wasteful number, since it uses less digits than its factorization.

78285957406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22848.

The product of its (nonzero) digits is 33868800, while the sum is 61.

The spelling of 78285957406 in words is "seventy-eight billion, two hundred eighty-five million, nine hundred fifty-seven thousand, four hundred six".