29006858621 has 16 divisors (see below), whose sum is σ = 31609836720. Its totient is φ = 26458306560.

The previous prime is 29006858609. The next prime is 29006858677. The reversal of 29006858621 is 12685860092.

It can be written as a sum of positive squares in 8 ways, for example, as 3354031396 + 25652827225 = 57914^2 + 160165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29006858621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29006858681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501101 + ... + 555981.

It is an arithmetic number, because the mean of its divisors is an integer number (1975614795).

Almost surely, 2^29006858621 is an apocalyptic number.

It is an amenable number.

29006858621 is a deficient number, since it is larger than the sum of its proper divisors (2602978099).

29006858621 is a wasteful number, since it uses less digits than its factorization.

29006858621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55376.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 29006858621 in words is "twenty-nine billion, six million, eight hundred fifty-eight thousand, six hundred twenty-one".