29155456985 has 4 divisors (see below), whose sum is σ = 34986548388. Its totient is φ = 23324365584.

The previous prime is 29155456973. The next prime is 29155456997. The reversal of 29155456985 is 58965455192.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (29155456973) and next prime (29155456997).

It can be written as a sum of positive squares in 2 ways, for example, as 4386677824 + 24768779161 = 66232^2 + 157381^2 .

It is a cyclic number.

It is not a de Polignac number, because 29155456985 - 2⁶ = 29155456921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2915545694 + ... + 2915545703.

It is an arithmetic number, because the mean of its divisors is an integer number (8746637097).

Almost surely, 2^29155456985 is an apocalyptic number.

It is an amenable number.

29155456985 is a deficient number, since it is larger than the sum of its proper divisors (5831091403).

29155456985 is an equidigital number, since it uses as much as digits as its factorization.

29155456985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831091402.

The product of its digits is 19440000, while the sum is 59.

The spelling of 29155456985 in words is "twenty-nine billion, one hundred fifty-five million, four hundred fifty-six thousand, nine hundred eighty-five".