78578425692 has 144 divisors (see below), whose sum is σ = 216728191680. Its totient is φ = 23860998144.

The previous prime is 78578425691. The next prime is 78578425697. The reversal of 78578425692 is 29652487587.

78578425692 is a `hidden beast` number, since 7 + 8 + 578 + 4 + 2 + 56 + 9 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78578425691) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13413228 + ... + 13419084.

Almost surely, 2^78578425692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78578425692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108364095840).

78578425692 is an abundant number, since it is smaller than the sum of its proper divisors (138149765988).

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

78578425692 is a wasteful number, since it uses less digits than its factorization.

78578425692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252 (or 6247 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 78578425692 in words is "seventy-eight billion, five hundred seventy-eight million, four hundred twenty-five thousand, six hundred ninety-two".