29379991680 has 256 divisors, whose sum is σ = 112059158400. Its totient is φ = 7231942656.

The previous prime is 29379991679. The next prime is 29379991709. The reversal of 29379991680 is 8619997392.

It is a happy number.

It is a super-2 number, since 2×29379991680² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159247 + ... + 290033.

Almost surely, 2^29379991680 is an apocalyptic number.

29379991680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29379991680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56029579200).

29379991680 is an abundant number, since it is smaller than the sum of its proper divisors (82679166720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29379991680 is a wasteful number, since it uses less digits than its factorization.

29379991680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130828 (or 130810 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The spelling of 29379991680 in words is "twenty-nine billion, three hundred seventy-nine million, nine hundred ninety-one thousand, six hundred eighty".