29988599949 has 160 divisors (see below), whose sum is σ = 57139568640. Its totient is φ = 15350718240.

The previous prime is 29988599917. The next prime is 29988599957. The reversal of 29988599949 is 94999588992.

It is not a de Polignac number, because 29988599949 - 2⁵ = 29988599917 is a prime.

It is a super-2 number, since 2×29988599949² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29988599959) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 59619232 + ... + 59619734.

It is an arithmetic number, because the mean of its divisors is an integer number (357122304).

Almost surely, 2^29988599949 is an apocalyptic number.

It is an amenable number.

29988599949 is a deficient number, since it is larger than the sum of its proper divisors (27150968691).

29988599949 is an equidigital number, since it uses as much as digits as its factorization.

29988599949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 603 counting only the distinct ones).

The product of its digits is 1360488960, while the sum is 81.

The spelling of 29988599949 in words is "twenty-nine billion, nine hundred eighty-eight million, five hundred ninety-nine thousand, nine hundred forty-nine".