626761665051 has 4 divisors (see below), whose sum is σ = 835682220072. Its totient is φ = 417841110032.

The previous prime is 626761665041. The next prime is 626761665073. The reversal of 626761665051 is 150566167626.

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 626761665051 - 2⁶ = 626761664987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 626761664985 and 626761665003.

It is not an unprimeable number, because it can be changed into a prime (626761665001) 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, 104460277506 + ... + 104460277511.

It is an arithmetic number, because the mean of its divisors is an integer number (208920555018).

Almost surely, 2^626761665051 is an apocalyptic number.

626761665051 is a deficient number, since it is larger than the sum of its proper divisors (208920555021).

626761665051 is a wasteful number, since it uses less digits than its factorization.

626761665051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208920555020.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 626761665051 in words is "six hundred twenty-six billion, seven hundred sixty-one million, six hundred sixty-five thousand, fifty-one".