7011618978 has 64 divisors (see below), whose sum is σ = 17383726080. Its totient is φ = 1835894592.

The previous prime is 7011618923. The next prime is 7011618989. The reversal of 7011618978 is 8798161107.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29701 + ... + 122087.

It is an arithmetic number, because the mean of its divisors is an integer number (271620720).

Almost surely, 2^7011618978 is an apocalyptic number.

7011618978 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7011618978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8691863040).

7011618978 is an abundant number, since it is smaller than the sum of its proper divisors (10372107102).

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

7011618978 is a wasteful number, since it uses less digits than its factorization.

7011618978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92551.

The product of its (nonzero) digits is 169344, while the sum is 48.

The square root of 7011618978 is about 83735.4105381947. The cubic root of 7011618978 is about 1913.9889932096.

The spelling of 7011618978 in words is "seven billion, eleven million, six hundred eighteen thousand, nine hundred seventy-eight".