84650156809 has 9 divisors (see below), whose sum is σ = 89345750823. Its totient is φ = 80189648352.

The previous prime is 84650156791. The next prime is 84650156821. The reversal of 84650156809 is 90865105648.

The square root of 84650156809 is 290947.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 84639101184 = 3325^2 + 290928^2 .

It is not a de Polignac number, because 84650156809 - 2⁷ = 84650156681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84650156009) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5520337 + ... + 5535649.

It is an arithmetic number, because the mean of its divisors is an integer number (9927305647).

Almost surely, 2^84650156809 is an apocalyptic number.

84650156809 is the 290947-th square number.

84650156809 is the 145474-th centered octagonal number.

It is an amenable number.

84650156809 is a deficient number, since it is larger than the sum of its proper divisors (4695594014).

84650156809 is an frugal number, since it uses more digits than its factorization.

84650156809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30664 (or 15332 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 84650156809 in words is "eighty-four billion, six hundred fifty million, one hundred fifty-six thousand, eight hundred nine".