29121357268 has 6 divisors (see below), whose sum is σ = 50962375226. Its totient is φ = 14560678632.

The previous prime is 29121357259. The next prime is 29121357269. The reversal of 29121357268 is 86275312192.

It can be written as a sum of positive squares in only one way, i.e., 25775660304 + 3345696964 = 160548^2 + 57842^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29121357269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640169655 + ... + 3640169662.

Almost surely, 2^29121357268 is an apocalyptic number.

It is an amenable number.

29121357268 is a deficient number, since it is larger than the sum of its proper divisors (21841017958).

29121357268 is a wasteful number, since it uses less digits than its factorization.

29121357268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7280339321 (or 7280339319 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The spelling of 29121357268 in words is "twenty-nine billion, one hundred twenty-one million, three hundred fifty-seven thousand, two hundred sixty-eight".