29789993612640 has 96 divisors (see below), whose sum is σ = 94061374769376. Its totient is φ = 7925128888320.

The previous prime is 29789993612627. The next prime is 29789993612663. The reversal of 29789993612640 is 4621639998792.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×29789993612640² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73506337 + ... + 73910496.

It is an arithmetic number, because the mean of its divisors is an integer number (979805987181).

Almost surely, 2^{29789993612640} is an apocalyptic number.

29789993612640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29789993612640 is an abundant number, since it is smaller than the sum of its proper divisors (64271381156736).

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

29789993612640 is a wasteful number, since it uses less digits than its factorization.

29789993612640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147417272 (or 147417264 counting only the distinct ones).

The product of its (nonzero) digits is 634894848, while the sum is 75.

The spelling of 29789993612640 in words is "twenty-nine trillion, seven hundred eighty-nine billion, nine hundred ninety-three million, six hundred twelve thousand, six hundred forty".