29568450681 has 126 divisors (see below), whose sum is σ = 56693037786. Its totient is φ = 15357988800.

The previous prime is 29568450677. The next prime is 29568450767. The reversal of 29568450681 is 18605486592.

29568450681 is a `hidden beast` number, since 2 + 9 + 56 + 8 + 4 + 506 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27662342400 + 1906108281 = 166320^2 + 43659^2 .

It is not a de Polignac number, because 29568450681 - 2² = 29568450677 is a prime.

It is a super-2 number, since 2×29568450681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29568450631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 125 ways as a sum of consecutive naturals, for example, 4318821 + ... + 4325661.

Almost surely, 2^29568450681 is an apocalyptic number.

29568450681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

29568450681 is a deficient number, since it is larger than the sum of its proper divisors (27124587105).

29568450681 is an equidigital number, since it uses as much as digits as its factorization.

29568450681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6895 (or 6862 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

It can be divided in two parts, 29568 and 450681, that added together give a square (480249 = 693²).

The spelling of 29568450681 in words is "twenty-nine billion, five hundred sixty-eight million, four hundred fifty thousand, six hundred eighty-one".