78206919024 has 160 divisors (see below), whose sum is σ = 219968143360. Its totient is φ = 23800283136.

The previous prime is 78206919001. The next prime is 78206919041. The reversal of 78206919024 is 42091960287.

It is a Cunningham number, because it is equal to 279655²-1.

It is a super-2 number, since 2×78206919024² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29082672 + ... + 29085360.

It is an arithmetic number, because the mean of its divisors is an integer number (1374800896).

Almost surely, 2^78206919024 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 78206919024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109984071680).

78206919024 is an abundant number, since it is smaller than the sum of its proper divisors (141761224336).

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

78206919024 is a wasteful number, since it uses less digits than its factorization.

78206919024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207 (or 3201 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 78206919024 in words is "seventy-eight billion, two hundred six million, nine hundred nineteen thousand, twenty-four".