29124140985 has 12 divisors (see below), whose sum is σ = 50481844452. Its totient is φ = 15532875168.

The previous prime is 29124140959. The next prime is 29124140987. The reversal of 29124140985 is 58904142192.

It is a happy number.

29124140985 is a `hidden beast` number, since 291 + 241 + 40 + 9 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19638939321 + 9485201664 = 140139^2 + 97392^2 .

It is not a de Polignac number, because 29124140985 - 2²⁰ = 29123092409 is a prime.

It is a super-2 number, since 2×29124140985² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 647203133 = 29124140985 / (2 + 9 + 1 + 2 + 4 + 1 + 4 + 0 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 29124140985.

It is not an unprimeable number, because it can be changed into a prime (29124140987) 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, 323601522 + ... + 323601611.

It is an arithmetic number, because the mean of its divisors is an integer number (4206820371).

Almost surely, 2^29124140985 is an apocalyptic number.

It is an amenable number.

29124140985 is a deficient number, since it is larger than the sum of its proper divisors (21357703467).

29124140985 is a wasteful number, since it uses less digits than its factorization.

29124140985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647203144 (or 647203141 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 29124140985 in words is "twenty-nine billion, one hundred twenty-four million, one hundred forty thousand, nine hundred eighty-five".