1671632457 has 16 divisors (see below), whose sum is σ = 2574493632. Its totient is φ = 953515520.

The previous prime is 1671632453. The next prime is 1671632477. The reversal of 1671632457 is 7542361761.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1671632457 - 2² = 1671632453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1671632453) 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, 1489308 + ... + 1490429.

It is an arithmetic number, because the mean of its divisors is an integer number (160905852).

Almost surely, 2^1671632457 is an apocalyptic number.

1671632457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1671632457 is a deficient number, since it is larger than the sum of its proper divisors (902861175).

1671632457 is a wasteful number, since it uses less digits than its factorization.

1671632457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979768.

The product of its digits is 211680, while the sum is 42.

The square root of 1671632457 is about 40885.6020745690. The cubic root of 1671632457 is about 1186.8074530586.

The spelling of 1671632457 in words is "one billion, six hundred seventy-one million, six hundred thirty-two thousand, four hundred fifty-seven".