7738781051 has 4 divisors (see below), whose sum is σ = 8005635600. Its totient is φ = 7471926504.

The previous prime is 7738781041. The next prime is 7738781077. The reversal of 7738781051 is 1501878377.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7738781051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7738780987 and 7738781005.

It is not an unprimeable number, because it can be changed into a prime (7738781041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133427231 + ... + 133427288.

It is an arithmetic number, because the mean of its divisors is an integer number (2001408900).

Almost surely, 2^7738781051 is an apocalyptic number.

7738781051 is a deficient number, since it is larger than the sum of its proper divisors (266854549).

7738781051 is a wasteful number, since it uses less digits than its factorization.

7738781051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266854548.

The product of its (nonzero) digits is 329280, while the sum is 47.

The square root of 7738781051 is about 87970.3418829323. The cubic root of 7738781051 is about 1977.9904322043.

The spelling of 7738781051 in words is "seven billion, seven hundred thirty-eight million, seven hundred eighty-one thousand, fifty-one".