1945610957 has 4 divisors (see below), whose sum is σ = 2012701020. Its totient is φ = 1878520896.

The previous prime is 1945610929. The next prime is 1945610959. The reversal of 1945610957 is 7590165491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1105828516 + 839782441 = 33254^2 + 28979^2 .

It is a cyclic number.

It is not a de Polignac number, because 1945610957 - 2⁶ = 1945610893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945610959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33544988 + ... + 33545045.

It is an arithmetic number, because the mean of its divisors is an integer number (503175255).

Almost surely, 2^1945610957 is an apocalyptic number.

It is an amenable number.

1945610957 is a deficient number, since it is larger than the sum of its proper divisors (67090063).

1945610957 is an equidigital number, since it uses as much as digits as its factorization.

1945610957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67090062.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 1945610957 is about 44109.0802103150. The cubic root of 1945610957 is about 1248.3949440785.

The spelling of 1945610957 in words is "one billion, nine hundred forty-five million, six hundred ten thousand, nine hundred fifty-seven".