7978019616 has 192 divisors, whose sum is σ = 27096249600. Its totient is φ = 2236336128.

The previous prime is 7978019561. The next prime is 7978019629. The reversal of 7978019616 is 6169108797.

7978019616 is a `hidden beast` number, since 7 + 9 + 7 + 8 + 0 + 19 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308100 + ... + 332988.

It is an arithmetic number, because the mean of its divisors is an integer number (141126300).

Almost surely, 2^7978019616 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 7978019616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13548124800).

7978019616 is an abundant number, since it is smaller than the sum of its proper divisors (19118229984).

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

7978019616 is a wasteful number, since it uses less digits than its factorization.

7978019616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24968 (or 24954 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 7978019616 is about 89319.7605012463. The cubic root of 7978019616 is about 1998.1666212080.

The spelling of 7978019616 in words is "seven billion, nine hundred seventy-eight million, nineteen thousand, six hundred sixteen".