6619194401 has 4 divisors (see below), whose sum is σ = 6622350000. Its totient is φ = 6616038804.

The previous prime is 6619194389. The next prime is 6619194451. The reversal of 6619194401 is 1044919166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1044919166 = 2 ⋅522459583.

It is a cyclic number.

It is not a de Polignac number, because 6619194401 - 2²² = 6615000097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6619194451) 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, 1574651 + ... + 1578848.

It is an arithmetic number, because the mean of its divisors is an integer number (1655587500).

Almost surely, 2^6619194401 is an apocalyptic number.

It is an amenable number.

6619194401 is a deficient number, since it is larger than the sum of its proper divisors (3155599).

6619194401 is a wasteful number, since it uses less digits than its factorization.

6619194401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155598.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 6619194401 is about 81358.4316527795. The cubic root of 6619194401 is about 1877.5941007077.

The spelling of 6619194401 in words is "six billion, six hundred nineteen million, one hundred ninety-four thousand, four hundred one".