1956825909 has 6 divisors (see below), whose sum is σ = 2826526326. Its totient is φ = 1304550600.

The previous prime is 1956825887. The next prime is 1956825917. The reversal of 1956825909 is 9095286591.

1956825909 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1951695684 + 5130225 = 44178^2 + 2265^2 .

It is not a de Polignac number, because 1956825909 - 2¹⁶ = 1956760373 is a prime.

It is a super-3 number, since 3×1956825909³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956825109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108712542 + ... + 108712559.

It is an arithmetic number, because the mean of its divisors is an integer number (471087721).

Almost surely, 2^1956825909 is an apocalyptic number.

It is an amenable number.

1956825909 is a deficient number, since it is larger than the sum of its proper divisors (869700417).

1956825909 is a wasteful number, since it uses less digits than its factorization.

1956825909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217425107 (or 217425104 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The square root of 1956825909 is about 44236.0250135565. The cubic root of 1956825909 is about 1250.7890290950.

The spelling of 1956825909 in words is "one billion, nine hundred fifty-six million, eight hundred twenty-five thousand, nine hundred nine".