729018251660 has 12 divisors (see below), whose sum is σ = 1530938328528. Its totient is φ = 291607300656.

The previous prime is 729018251581. The next prime is 729018251681. The reversal of 729018251660 is 66152810927.

It is a happy number.

It is a super-2 number, since 2×729018251660² (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 3 ways as a sum of consecutive naturals, for example, 18225456272 + ... + 18225456311.

It is an arithmetic number, because the mean of its divisors is an integer number (127578194044).

Almost surely, 2^729018251660 is an apocalyptic number.

It is an amenable number.

729018251660 is an abundant number, since it is smaller than the sum of its proper divisors (801920076868).

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

729018251660 is a wasteful number, since it uses less digits than its factorization.

729018251660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36450912592 (or 36450912590 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 729018251660 in words is "seven hundred twenty-nine billion, eighteen million, two hundred fifty-one thousand, six hundred sixty".