7878049322051 has 4 divisors (see below), whose sum is σ = 8341463988072. Its totient is φ = 7414634656032.

The previous prime is 7878049322047. The next prime is 7878049322071. The reversal of 7878049322051 is 1502239408787.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7878049322051 - 2² = 7878049322047 is a prime.

It is a super-2 number, since 2×7878049322051² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7878049322071) 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 3 ways as a sum of consecutive naturals, for example, 231707332985 + ... + 231707333018.

It is an arithmetic number, because the mean of its divisors is an integer number (2085365997018).

Almost surely, 2^{7878049322051} is an apocalyptic number.

7878049322051 is a deficient number, since it is larger than the sum of its proper divisors (463414666021).

7878049322051 is a wasteful number, since it uses less digits than its factorization.

7878049322051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463414666020.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 7878049322051 in words is "seven trillion, eight hundred seventy-eight billion, forty-nine million, three hundred twenty-two thousand, fifty-one".