7786278241 has 4 divisors (see below), whose sum is σ = 8898603712. Its totient is φ = 6673952772.

The previous prime is 7786278233. The next prime is 7786278259. The reversal of 7786278241 is 1428726877.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7786278241 - 2³ = 7786278233 is a prime.

It is a super-2 number, since 2×7786278241² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7786278271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556162725 + ... + 556162738.

It is an arithmetic number, because the mean of its divisors is an integer number (2224650928).

Almost surely, 2^7786278241 is an apocalyptic number.

It is an amenable number.

7786278241 is a deficient number, since it is larger than the sum of its proper divisors (1112325471).

7786278241 is a wasteful number, since it uses less digits than its factorization.

7786278241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112325470.

The product of its digits is 2107392, while the sum is 52.

The square root of 7786278241 is about 88239.8903047822. The cubic root of 7786278241 is about 1982.0288560761.

The spelling of 7786278241 in words is "seven billion, seven hundred eighty-six million, two hundred seventy-eight thousand, two hundred forty-one".