16253799849 has 48 divisors (see below), whose sum is σ = 28101291840. Its totient is φ = 9257976000.

The previous prime is 16253799767. The next prime is 16253799851. The reversal of 16253799849 is 94899735261.

16253799849 is a `hidden beast` number, since 1 + 6 + 2 + 537 + 9 + 98 + 4 + 9 = 666.

It is not a de Polignac number, because 16253799849 - 2⁷ = 16253799721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (16253799899) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 394474 + ... + 433724.

It is an arithmetic number, because the mean of its divisors is an integer number (585443580).

Almost surely, 2^16253799849 is an apocalyptic number.

It is an amenable number.

16253799849 is a deficient number, since it is larger than the sum of its proper divisors (11847491991).

16253799849 is a wasteful number, since it uses less digits than its factorization.

16253799849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39587 (or 39574 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 16253799849 in words is "sixteen billion, two hundred fifty-three million, seven hundred ninety-nine thousand, eight hundred forty-nine".