78425458212 has 12 divisors (see below), whose sum is σ = 182992735856. Its totient is φ = 26141819400.

The previous prime is 78425458171. The next prime is 78425458217. The reversal of 78425458212 is 21285452487.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (78425458217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3267727414 + ... + 3267727437.

Almost surely, 2^78425458212 is an apocalyptic number.

It is an amenable number.

78425458212 is an abundant number, since it is smaller than the sum of its proper divisors (104567277644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78425458212 is a wasteful number, since it uses less digits than its factorization.

78425458212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535454858 (or 6535454856 counting only the distinct ones).

The product of its digits is 1433600, while the sum is 48.

The spelling of 78425458212 in words is "seventy-eight billion, four hundred twenty-five million, four hundred fifty-eight thousand, two hundred twelve".