194022909477 has 6 divisors (see below), whose sum is σ = 280255313702. Its totient is φ = 129348606312.

The previous prime is 194022909449. The next prime is 194022909527. The reversal of 194022909477 is 774909220491.

It can be written as a sum of positive squares in only one way, i.e., 183932907876 + 10090001601 = 428874^2 + 100449^2 .

It is not a de Polignac number, because 194022909477 - 2¹⁵ = 194022876709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194022909407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10779050518 + ... + 10779050535.

Almost surely, 2^194022909477 is an apocalyptic number.

It is an amenable number.

194022909477 is a deficient number, since it is larger than the sum of its proper divisors (86232404225).

194022909477 is a wasteful number, since it uses less digits than its factorization.

194022909477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21558101059 (or 21558101056 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 194022909477 in words is "one hundred ninety-four billion, twenty-two million, nine hundred nine thousand, four hundred seventy-seven".