7778576442 has 48 divisors (see below), whose sum is σ = 19489190112. Its totient is φ = 2051491680.

The previous prime is 7778576441. The next prime is 7778576453. The reversal of 7778576442 is 2446758777.

It is not an unprimeable number, because it can be changed into a prime (7778576441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1013784 + ... + 1021427.

It is an arithmetic number, because the mean of its divisors is an integer number (406024794).

Almost surely, 2^7778576442 is an apocalyptic number.

7778576442 is an abundant number, since it is smaller than the sum of its proper divisors (11710613670).

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

7778576442 is a wasteful number, since it uses less digits than its factorization.

7778576442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035243 (or 2035236 counting only the distinct ones).

The product of its digits is 18439680, while the sum is 57.

The square root of 7778576442 is about 88196.2382531137. The cubic root of 7778576442 is about 1981.3751323780.

The spelling of 7778576442 in words is "seven billion, seven hundred seventy-eight million, five hundred seventy-six thousand, four hundred forty-two".