1945968553 has 4 divisors (see below), whose sum is σ = 1949175040. Its totient is φ = 1942762068.

The previous prime is 1945968551. The next prime is 1945968599. The reversal of 1945968553 is 3558695491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1945968553 - 2¹ = 1945968551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1945968494 and 1945968503.

It is not an unprimeable number, because it can be changed into a prime (1945968551) 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, 1602333 + ... + 1603546.

It is an arithmetic number, because the mean of its divisors is an integer number (487293760).

Almost surely, 2^1945968553 is an apocalyptic number.

It is an amenable number.

1945968553 is a deficient number, since it is larger than the sum of its proper divisors (3206487).

1945968553 is an equidigital number, since it uses as much as digits as its factorization.

1945968553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206486.

The product of its digits is 5832000, while the sum is 55.

The square root of 1945968553 is about 44113.1335658668. The cubic root of 1945968553 is about 1248.4714228301.

The spelling of 1945968553 in words is "one billion, nine hundred forty-five million, nine hundred sixty-eight thousand, five hundred fifty-three".