1634657449 has 8 divisors (see below), whose sum is σ = 1706755392. Its totient is φ = 1562645040.

The previous prime is 1634657411. The next prime is 1634657459. The reversal of 1634657449 is 9447564361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1634657449 - 2⁹ = 1634656937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1634657459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19354 + ... + 60364.

It is an arithmetic number, because the mean of its divisors is an integer number (213344424).

Almost surely, 2^1634657449 is an apocalyptic number.

It is an amenable number.

1634657449 is a deficient number, since it is larger than the sum of its proper divisors (72097943).

1634657449 is a wasteful number, since it uses less digits than its factorization.

1634657449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42767.

The product of its digits is 2177280, while the sum is 49.

The square root of 1634657449 is about 40430.8972074576. The cubic root of 1634657449 is about 1177.9917600741.

The spelling of 1634657449 in words is "one billion, six hundred thirty-four million, six hundred fifty-seven thousand, four hundred forty-nine".