729969669481 has 4 divisors (see below), whose sum is σ = 786121182532. Its totient is φ = 673818156432.

The previous prime is 729969669479. The next prime is 729969669497. The reversal of 729969669481 is 184966969927.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 341985192025 + 387984477456 = 584795^2 + 622884^2 .

It is a cyclic number.

It is not a de Polignac number, because 729969669481 - 2¹ = 729969669479 is a prime.

It is a super-2 number, since 2×729969669481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 729969669398 and 729969669407.

It is not an unprimeable number, because it can be changed into a prime (729969669281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28075756506 + ... + 28075756531.

It is an arithmetic number, because the mean of its divisors is an integer number (196530295633).

Almost surely, 2^729969669481 is an apocalyptic number.

It is an amenable number.

729969669481 is a deficient number, since it is larger than the sum of its proper divisors (56151513051).

729969669481 is a wasteful number, since it uses less digits than its factorization.

729969669481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56151513050.

The product of its digits is 634894848, while the sum is 76.

The spelling of 729969669481 in words is "seven hundred twenty-nine billion, nine hundred sixty-nine million, six hundred sixty-nine thousand, four hundred eighty-one".