229904629561 has 16 divisors (see below), whose sum is σ = 237221187840. Its totient is φ = 222691004800.

The previous prime is 229904629553. The next prime is 229904629567. The reversal of 229904629561 is 165926409922.

It is a cyclic number.

It is not a de Polignac number, because 229904629561 - 2³ = 229904629553 is a prime.

It is a super-2 number, since 2×229904629561² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229904629567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12945690 + ... + 12963436.

It is an arithmetic number, because the mean of its divisors is an integer number (14826324240).

Almost surely, 2^229904629561 is an apocalyptic number.

It is an amenable number.

229904629561 is a deficient number, since it is larger than the sum of its proper divisors (7316558279).

229904629561 is a wasteful number, since it uses less digits than its factorization.

229904629561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20624.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 229904629561 in words is "two hundred twenty-nine billion, nine hundred four million, six hundred twenty-nine thousand, five hundred sixty-one".