1642546449 has 24 divisors (see below), whose sum is σ = 2478158592. Its totient is φ = 1046390400.

The previous prime is 1642546429. The next prime is 1642546471. The reversal of 1642546449 is 9446452461.

1642546449 is a `hidden beast` number, since 1 + 64 + 2 + 546 + 4 + 49 = 666.

It is not a de Polignac number, because 1642546449 - 2¹² = 1642542353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1642546429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245304 + ... + 251910.

It is an arithmetic number, because the mean of its divisors is an integer number (103256608).

Almost surely, 2^1642546449 is an apocalyptic number.

It is an amenable number.

1642546449 is a deficient number, since it is larger than the sum of its proper divisors (835612143).

1642546449 is a wasteful number, since it uses less digits than its factorization.

1642546449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7837 (or 7834 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 1642546449 is about 40528.3413058072. The cubic root of 1642546449 is about 1179.8837501585.

The spelling of 1642546449 in words is "one billion, six hundred forty-two million, five hundred forty-six thousand, four hundred forty-nine".