29889942555 has 32 divisors (see below), whose sum is σ = 55240455168. Its totient is φ = 13639616000.

The previous prime is 29889942553. The next prime is 29889942557. The reversal of 29889942555 is 55524998892.

It is an interprime number because it is at equal distance from previous prime (29889942553) and next prime (29889942557).

It is not a de Polignac number, because 29889942555 - 2¹ = 29889942553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29889942553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5325171 + ... + 5330780.

It is an arithmetic number, because the mean of its divisors is an integer number (1726264224).

Almost surely, 2^29889942555 is an apocalyptic number.

29889942555 is a deficient number, since it is larger than the sum of its proper divisors (25350512613).

29889942555 is a wasteful number, since it uses less digits than its factorization.

29889942555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655987.

The product of its digits is 93312000, while the sum is 66.

The spelling of 29889942555 in words is "twenty-nine billion, eight hundred eighty-nine million, nine hundred forty-two thousand, five hundred fifty-five".