729716405920 has 48 divisors (see below), whose sum is σ = 1766002708008. Its totient is φ = 284767375360.

The previous prime is 729716405909. The next prime is 729716405983. The reversal of 729716405920 is 29504617927.

It can be written as a sum of positive squares in 4 ways, for example, as 541148554384 + 188567851536 = 735628^2 + 434244^2 .

It is a super-2 number, since 2×729716405920² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55612069 + ... + 55625188.

Almost surely, 2^729716405920 is an apocalyptic number.

It is an amenable number.

729716405920 is an abundant number, since it is smaller than the sum of its proper divisors (1036286302088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

729716405920 is a wasteful number, since it uses less digits than its factorization.

729716405920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111237313 (or 111237305 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 729716405920 in words is "seven hundred twenty-nine billion, seven hundred sixteen million, four hundred five thousand, nine hundred twenty".