29961642618 has 24 divisors (see below), whose sum is σ = 65699026848. Its totient is φ = 9866885832.

The previous prime is 29961642617. The next prime is 29961642629. The reversal of 29961642618 is 81624616992.

29961642618 is a `hidden beast` number, since 2 + 9 + 9 + 6 + 16 + 4 + 2 + 618 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (29961642617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10025830 + ... + 10028817.

It is an arithmetic number, because the mean of its divisors is an integer number (2737459452).

Almost surely, 2^29961642618 is an apocalyptic number.

29961642618 is an abundant number, since it is smaller than the sum of its proper divisors (35737384230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29961642618 is a wasteful number, since it uses less digits than its factorization.

29961642618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20054738 (or 20054735 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 29961642618 in words is "twenty-nine billion, nine hundred sixty-one million, six hundred forty-two thousand, six hundred eighteen".