1953643449 has 16 divisors (see below), whose sum is σ = 2627856000. Its totient is φ = 1290967296.

The previous prime is 1953643369. The next prime is 1953643463. The reversal of 1953643449 is 9443463591.

It is not a de Polignac number, because 1953643449 - 2¹² = 1953639353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1953643398 and 1953643407.

It is not an unprimeable number, because it can be changed into a prime (1953643249) 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, 220497 + ... + 229185.

It is an arithmetic number, because the mean of its divisors is an integer number (164241000).

Almost surely, 2^1953643449 is an apocalyptic number.

It is an amenable number.

1953643449 is a deficient number, since it is larger than the sum of its proper divisors (674212551).

1953643449 is a wasteful number, since it uses less digits than its factorization.

1953643449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9344.

The product of its digits is 1399680, while the sum is 48.

The square root of 1953643449 is about 44200.0390158199. The cubic root of 1953643449 is about 1250.1105926685.

The spelling of 1953643449 in words is "one billion, nine hundred fifty-three million, six hundred forty-three thousand, four hundred forty-nine".