29540803783681 has 4 divisors (see below), whose sum is σ = 29641625639892. Its totient is φ = 29439981927472.

The previous prime is 29540803783663. The next prime is 29540803783697. The reversal of 29540803783681 is 18638730804592.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26805884953600 + 2734918830081 = 5177440^2 + 1653759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29540803783681 is a prime.

It is a super-2 number, since 2×29540803783681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29540803783651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50410927666 + ... + 50410928251.

It is an arithmetic number, because the mean of its divisors is an integer number (7410406409973).

It is a 1-persistent number, because it is pandigital, but 2⋅29540803783681 = 59081607567362 is not.

Almost surely, 2^{29540803783681} is an apocalyptic number.

It is an amenable number.

29540803783681 is a deficient number, since it is larger than the sum of its proper divisors (100821856211).

29540803783681 is a wasteful number, since it uses less digits than its factorization.

29540803783681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100821856210.

The product of its (nonzero) digits is 69672960, while the sum is 64.

The spelling of 29540803783681 in words is "twenty-nine trillion, five hundred forty billion, eight hundred three million, seven hundred eighty-three thousand, six hundred eighty-one".