191620622444 has 24 divisors (see below), whose sum is σ = 336677101488. Its totient is φ = 95427927360.

The previous prime is 191620622437. The next prime is 191620622489. The reversal of 191620622444 is 444226026191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 915782 + ... + 1105394.

It is an arithmetic number, because the mean of its divisors is an integer number (14028212562).

Almost surely, 2^191620622444 is an apocalyptic number.

It is an amenable number.

191620622444 is a deficient number, since it is larger than the sum of its proper divisors (145056479044).

191620622444 is a wasteful number, since it uses less digits than its factorization.

191620622444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190625 (or 190623 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 191620622444 in words is "one hundred ninety-one billion, six hundred twenty million, six hundred twenty-two thousand, four hundred forty-four".