8725729745 has 8 divisors (see below), whose sum is σ = 10471415616. Its totient is φ = 6980223856.

The previous prime is 8725729741. The next prime is 8725729751. The reversal of 8725729745 is 5479275278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8725729745 - 2² = 8725729741 is a prime.

It is a super-2 number, since 2×8725729745² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8725729741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110564 + ... + 172266.

It is an arithmetic number, because the mean of its divisors is an integer number (1308926952).

Almost surely, 2^8725729745 is an apocalyptic number.

It is an amenable number.

8725729745 is a deficient number, since it is larger than the sum of its proper divisors (1745685871).

8725729745 is a wasteful number, since it uses less digits than its factorization.

8725729745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89991.

The product of its digits is 9878400, while the sum is 56.

The square root of 8725729745 is about 93411.6146151002. The cubic root of 8725729745 is about 2058.7356543075.

The spelling of 8725729745 in words is "eight billion, seven hundred twenty-five million, seven hundred twenty-nine thousand, seven hundred forty-five".