29997553309865 has 32 divisors (see below), whose sum is σ = 37986922252800. Its totient is φ = 22695105692160.

The previous prime is 29997553309849. The next prime is 29997553309877. The reversal of 29997553309865 is 56890335579992.

It is not a de Polignac number, because 29997553309865 - 2⁴ = 29997553309849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29997553309865.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153744791 + ... + 153939779.

It is an arithmetic number, because the mean of its divisors is an integer number (1187091320400).

Almost surely, 2^{29997553309865} is an apocalyptic number.

It is an amenable number.

29997553309865 is a deficient number, since it is larger than the sum of its proper divisors (7989368942935).

29997553309865 is a wasteful number, since it uses less digits than its factorization.

29997553309865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210137.

The product of its (nonzero) digits is 4960116000, while the sum is 80.

The spelling of 29997553309865 in words is "twenty-nine trillion, nine hundred ninety-seven billion, five hundred fifty-three million, three hundred nine thousand, eight hundred sixty-five".