2856455961 has 16 divisors (see below), whose sum is σ = 3822626880. Its totient is φ = 1897309440.

The previous prime is 2856455947. The next prime is 2856455963. The reversal of 2856455961 is 1695546582.

It is a happy number.

It is not a de Polignac number, because 2856455961 - 2⁹ = 2856455449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2856455963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1153821 + ... + 1156293.

It is an arithmetic number, because the mean of its divisors is an integer number (238914180).

Almost surely, 2^2856455961 is an apocalyptic number.

It is an amenable number.

2856455961 is a deficient number, since it is larger than the sum of its proper divisors (966170919).

2856455961 is a wasteful number, since it uses less digits than its factorization.

2856455961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736.

The product of its digits is 2592000, while the sum is 51.

The square root of 2856455961 is about 53445.8226711873. The cubic root of 2856455961 is about 1418.8696885292.

The spelling of 2856455961 in words is "two billion, eight hundred fifty-six million, four hundred fifty-five thousand, nine hundred sixty-one".