190356817401 has 9 divisors (see below), whose sum is σ = 274961737999. Its totient is φ = 126903672336.

The previous prime is 190356817361. The next prime is 190356817403. The reversal of 190356817401 is 104718653091.

The square root of 190356817401 is 436299.

It is a perfect power (a square), and thus also a powerful number.

190356817401 is a `hidden beast` number, since 19 + 0 + 3 + 568 + 1 + 74 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27767223225 + 162589594176 = 166635^2 + 403224^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 190356817401 - 2²³ = 190348428793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190356817403) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1236181 + ... + 1381613.

Almost surely, 2^190356817401 is an apocalyptic number.

190356817401 is the 436299-th square number.

190356817401 is the 218150-th centered octagonal number.

It is an amenable number.

190356817401 is a deficient number, since it is larger than the sum of its proper divisors (84604920598).

190356817401 is an frugal number, since it uses more digits than its factorization.

190356817401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290872 (or 145436 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 190356817401 in words is "one hundred ninety billion, three hundred fifty-six million, eight hundred seventeen thousand, four hundred one".