1956745849 has 8 divisors (see below), whose sum is σ = 2110941000. Its totient is φ = 1806894336.

The previous prime is 1956745841. The next prime is 1956745853. The reversal of 1956745849 is 9485476591.

It can be written as a sum of positive squares in 4 ways, for example, as 754875625 + 1201870224 = 27475^2 + 34668^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1956745849 - 2³ = 1956745841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1956745793 and 1956745802.

It is not an unprimeable number, because it can be changed into a prime (1956745841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1084974 + ... + 1086775.

It is an arithmetic number, because the mean of its divisors is an integer number (263867625).

Almost surely, 2^1956745849 is an apocalyptic number.

It is an amenable number.

1956745849 is a deficient number, since it is larger than the sum of its proper divisors (154195151).

1956745849 is a wasteful number, since it uses less digits than its factorization.

1956745849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171819.

The product of its digits is 10886400, while the sum is 58.

The square root of 1956745849 is about 44235.1200857418. The cubic root of 1956745849 is about 1250.7719709372.

The spelling of 1956745849 in words is "one billion, nine hundred fifty-six million, seven hundred forty-five thousand, eight hundred forty-nine".