7278396351 has 4 divisors (see below), whose sum is σ = 9704528472. Its totient is φ = 4852264232.

The previous prime is 7278396343. The next prime is 7278396361. The reversal of 7278396351 is 1536938727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1536938727 = 3 ⋅512312909.

It is a cyclic number.

It is not a de Polignac number, because 7278396351 - 2³ = 7278396343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7278396294 and 7278396303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7278396311) 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, 1213066056 + ... + 1213066061.

It is an arithmetic number, because the mean of its divisors is an integer number (2426132118).

Almost surely, 2^7278396351 is an apocalyptic number.

7278396351 is a deficient number, since it is larger than the sum of its proper divisors (2426132121).

7278396351 is a wasteful number, since it uses less digits than its factorization.

7278396351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426132120.

The product of its digits is 1905120, while the sum is 51.

The square root of 7278396351 is about 85313.5179851353. The cubic root of 7278396351 is about 1937.9618967631.

The spelling of 7278396351 in words is "seven billion, two hundred seventy-eight million, three hundred ninety-six thousand, three hundred fifty-one".