1906449951 has 16 divisors (see below), whose sum is σ = 2905683200. Its totient is φ = 1089168768.

The previous prime is 1906449893. The next prime is 1906449953. The reversal of 1906449951 is 1599446091.

It is a happy number.

1906449951 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-1906449951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1906449951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906449953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166860 + ... + 177918.

It is an arithmetic number, because the mean of its divisors is an integer number (181605200).

Almost surely, 2^1906449951 is an apocalyptic number.

1906449951 is a deficient number, since it is larger than the sum of its proper divisors (999233249).

1906449951 is a wasteful number, since it uses less digits than its factorization.

1906449951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19278.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 1906449951 is about 43662.9127635800. The cubic root of 1906449951 is about 1239.9622671054.

The spelling of 1906449951 in words is "one billion, nine hundred six million, four hundred forty-nine thousand, nine hundred fifty-one".