94660213561 has 3 divisors (see below), whose sum is σ = 94660521231. Its totient is φ = 94659905892.

The previous prime is 94660213553. The next prime is 94660213591. The reversal of 94660213561 is 16531206649.

The square root of 94660213561 is 307669.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 73559745961 + 21100467600 = 271219^2 + 145260^2 .

It is not a de Polignac number, because 94660213561 - 2³ = 94660213553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (94660213591) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 153835 + ... + 461503.

It is an arithmetic number, because the mean of its divisors is an integer number (31553507077).

Almost surely, 2^94660213561 is an apocalyptic number.

94660213561 is the 307669-th square number.

94660213561 is the 153835-th centered octagonal number.

It is an amenable number.

94660213561 is a deficient number, since it is larger than the sum of its proper divisors (307670).

94660213561 is an frugal number, since it uses more digits than its factorization.

94660213561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615338 (or 307669 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 94660213561 in words is "ninety-four billion, six hundred sixty million, two hundred thirteen thousand, five hundred sixty-one".