1867916649 has 12 divisors (see below), whose sum is σ = 2500770608. Its totient is φ = 1240191000.

The previous prime is 1867916647. The next prime is 1867916653. The reversal of 1867916649 is 9466197681.

It is not a de Polignac number, because 1867916649 - 2¹ = 1867916647 is a prime.

It is a super-2 number, since 2×1867916649² = 6978225215222778402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1867916647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184062 + ... + 193944.

Almost surely, 2^1867916649 is an apocalyptic number.

It is an amenable number.

1867916649 is a deficient number, since it is larger than the sum of its proper divisors (632853959).

1867916649 is an frugal number, since it uses more digits than its factorization.

1867916649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10388 (or 10137 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 57.

The square root of 1867916649 is about 43219.4013031185. The cubic root of 1867916649 is about 1231.5512735954.

The spelling of 1867916649 in words is "one billion, eight hundred sixty-seven million, nine hundred sixteen thousand, six hundred forty-nine".