29780709129 has 8 divisors (see below), whose sum is σ = 44119569120. Its totient is φ = 19853806068.

The previous prime is 29780709121. The next prime is 29780709139. The reversal of 29780709129 is 92190708792.

It is not a de Polignac number, because 29780709129 - 2³ = 29780709121 is a prime.

It is a super-2 number, since 2×29780709129² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29780709121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551494587 + ... + 551494640.

It is an arithmetic number, because the mean of its divisors is an integer number (5514946140).

Almost surely, 2^29780709129 is an apocalyptic number.

It is an amenable number.

29780709129 is a deficient number, since it is larger than the sum of its proper divisors (14338859991).

29780709129 is a wasteful number, since it uses less digits than its factorization.

29780709129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102989236 (or 1102989230 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The spelling of 29780709129 in words is "twenty-nine billion, seven hundred eighty million, seven hundred nine thousand, one hundred twenty-nine".