83874548649 has 4 divisors (see below), whose sum is σ = 111832731536. Its totient is φ = 55916365764.

The previous prime is 83874548647. The next prime is 83874548669. The reversal of 83874548649 is 94684547838.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 83874548649 - 2¹ = 83874548647 is a prime.

It is a super-2 number, since 2×83874548649² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83874548649.

It is not an unprimeable number, because it can be changed into a prime (83874548647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13979091439 + ... + 13979091444.

It is an arithmetic number, because the mean of its divisors is an integer number (27958182884).

Almost surely, 2^83874548649 is an apocalyptic number.

It is an amenable number.

83874548649 is a deficient number, since it is larger than the sum of its proper divisors (27958182887).

83874548649 is a wasteful number, since it uses less digits than its factorization.

83874548649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27958182886.

The product of its digits is 185794560, while the sum is 66.

The spelling of 83874548649 in words is "eighty-three billion, eight hundred seventy-four million, five hundred forty-eight thousand, six hundred forty-nine".