1906536632309 has 4 divisors (see below), whose sum is σ = 1921548731904. Its totient is φ = 1891524532716.

The previous prime is 1906536632291. The next prime is 1906536632323. The reversal of 1906536632309 is 9032366356091.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1906536632309 is a prime.

It is a super-2 number, since 2×1906536632309² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906536652309) 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, 7506049607 + ... + 7506049860.

It is an arithmetic number, because the mean of its divisors is an integer number (480387182976).

Almost surely, 2^{1906536632309} is an apocalyptic number.

It is an amenable number.

1906536632309 is a deficient number, since it is larger than the sum of its proper divisors (15012099595).

1906536632309 is a wasteful number, since it uses less digits than its factorization.

1906536632309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15012099594.

The product of its (nonzero) digits is 4723920, while the sum is 53.

The spelling of 1906536632309 in words is "one trillion, nine hundred six billion, five hundred thirty-six million, six hundred thirty-two thousand, three hundred nine".