7778420241 has 16 divisors (see below), whose sum is σ = 11149363200. Its totient is φ = 4808159568.

The previous prime is 7778420219. The next prime is 7778420249. The reversal of 7778420241 is 1420248777.

It is not a de Polignac number, because 7778420241 - 2¹³ = 7778412049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7778420193 and 7778420202.

It is not an unprimeable number, because it can be changed into a prime (7778420249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449061 + ... + 1454418.

It is an arithmetic number, because the mean of its divisors is an integer number (696835200).

Almost surely, 2^7778420241 is an apocalyptic number.

It is an amenable number.

7778420241 is a deficient number, since it is larger than the sum of its proper divisors (3370942959).

7778420241 is a wasteful number, since it uses less digits than its factorization.

7778420241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903548.

The product of its (nonzero) digits is 175616, while the sum is 42.

The square root of 7778420241 is about 88195.3527177028. The cubic root of 7778420241 is about 1981.3618696750.

The spelling of 7778420241 in words is "seven billion, seven hundred seventy-eight million, four hundred twenty thousand, two hundred forty-one".