6623438190851 has 4 divisors (see below), whose sum is σ = 6627821672304. Its totient is φ = 6619054709400.

The previous prime is 6623438190829. The next prime is 6623438190883. The reversal of 6623438190851 is 1580918343266.

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 6623438190851 - 2³⁰ = 6622364449027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6623438190251) 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, 2191738460 + ... + 2191741481.

It is an arithmetic number, because the mean of its divisors is an integer number (1656955418076).

Almost surely, 2^{6623438190851} is an apocalyptic number.

6623438190851 is a deficient number, since it is larger than the sum of its proper divisors (4383481453).

6623438190851 is a wasteful number, since it uses less digits than its factorization.

6623438190851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4383481452.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 6623438190851 in words is "six trillion, six hundred twenty-three billion, four hundred thirty-eight million, one hundred ninety thousand, eight hundred fifty-one".