2012616261 has 8 divisors (see below), whose sum is σ = 2981653760. Its totient is φ = 1341744156.

The previous prime is 2012616251. The next prime is 2012616271. The reversal of 2012616261 is 1626162102.

2012616261 is a `hidden beast` number, since 20 + 1 + 2 + 616 + 26 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2012616251) and next prime (2012616271).

It is not a de Polignac number, because 2012616261 - 2¹³ = 2012608069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 74541343 = 2012616261 / (2 + 0 + 1 + 2 + 6 + 1 + 6 + 2 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012616251) 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, 37270645 + ... + 37270698.

It is an arithmetic number, because the mean of its divisors is an integer number (372706720).

Almost surely, 2^2012616261 is an apocalyptic number.

It is an amenable number.

2012616261 is a deficient number, since it is larger than the sum of its proper divisors (969037499).

2012616261 is an equidigital number, since it uses as much as digits as its factorization.

2012616261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74541352 (or 74541346 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2012616261 is about 44862.1918880476. The cubic root of 2012616261 is about 1262.5647475338.

Adding to 2012616261 its reverse (1626162102), we get a palindrome (3638778363).

The spelling of 2012616261 in words is "two billion, twelve million, six hundred sixteen thousand, two hundred sixty-one".