7940771776 has 56 divisors (see below), whose sum is σ = 18262250496. Its totient is φ = 3355242240.

The previous prime is 7940771771. The next prime is 7940771789. The reversal of 7940771776 is 6771770497.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7940771771) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 93016 + ... + 156631.

It is an arithmetic number, because the mean of its divisors is an integer number (326111616).

Almost surely, 2^7940771776 is an apocalyptic number.

It is an amenable number.

7940771776 is an abundant number, since it is smaller than the sum of its proper divisors (10321478720).

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

7940771776 is a wasteful number, since it uses less digits than its factorization.

7940771776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249737 (or 249727 counting only the distinct ones).

The product of its (nonzero) digits is 3630312, while the sum is 55.

The square root of 7940771776 is about 89111.0081639749. The cubic root of 7940771776 is about 1995.0520838239.

The spelling of 7940771776 in words is "seven billion, nine hundred forty million, seven hundred seventy-one thousand, seven hundred seventy-six".