29294927681 has 4 divisors (see below), whose sum is σ = 30836766000. Its totient is φ = 27753089364.

The previous prime is 29294927633. The next prime is 29294927687. The reversal of 29294927681 is 18672949292.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29294927681 - 2¹⁴ = 29294911297 is a prime.

It is a super-2 number, since 2×29294927681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29294927681.

It is not an unprimeable number, because it can be changed into a prime (29294927687) 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 3 ways as a sum of consecutive naturals, for example, 770919131 + ... + 770919168.

It is an arithmetic number, because the mean of its divisors is an integer number (7709191500).

Almost surely, 2^29294927681 is an apocalyptic number.

It is an amenable number.

29294927681 is a deficient number, since it is larger than the sum of its proper divisors (1541838319).

29294927681 is a wasteful number, since it uses less digits than its factorization.

29294927681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541838318.

The product of its digits is 7838208, while the sum is 59.

The spelling of 29294927681 in words is "twenty-nine billion, two hundred ninety-four million, nine hundred twenty-seven thousand, six hundred eighty-one".