1956430645 has 16 divisors (see below), whose sum is σ = 2551515120. Its totient is φ = 1431489024.

The previous prime is 1956430621. The next prime is 1956430649. The reversal of 1956430645 is 5460346591.

1956430645 is digitally balanced in base 6, 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 8 ways, for example, as 512886609 + 1443544036 = 22647^2 + 37994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956430645 - 2¹¹ = 1956428597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956430649) 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, 130984 + ... + 145153.

It is an arithmetic number, because the mean of its divisors is an integer number (159469695).

Almost surely, 2^1956430645 is an apocalyptic number.

It is an amenable number.

1956430645 is a deficient number, since it is larger than the sum of its proper divisors (595084475).

1956430645 is a wasteful number, since it uses less digits than its factorization.

1956430645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276264.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 1956430645 is about 44231.5571170629. The cubic root of 1956430645 is about 1250.7048067899.

The spelling of 1956430645 in words is "one billion, nine hundred fifty-six million, four hundred thirty thousand, six hundred forty-five".