16201474901 has 4 divisors (see below), whose sum is σ = 16202144172. Its totient is φ = 16200805632.

The previous prime is 16201474897. The next prime is 16201474903. The reversal of 16201474901 is 10947410261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2698802500 + 13502672401 = 51950^2 + 116201^2 .

It is a cyclic number.

It is not a de Polignac number, because 16201474901 - 2² = 16201474897 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 (16201474903) 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, 296906 + ... + 347211.

It is an arithmetic number, because the mean of its divisors is an integer number (4050536043).

Almost surely, 2^16201474901 is an apocalyptic number.

It is an amenable number.

16201474901 is a deficient number, since it is larger than the sum of its proper divisors (669271).

16201474901 is an equidigital number, since it uses as much as digits as its factorization.

16201474901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669270.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 16201474901 in words is "sixteen billion, two hundred one million, four hundred seventy-four thousand, nine hundred one".