61306979311 has 2 divisors, whose sum is σ = 61306979312. Its totient is φ = 61306979310.

The previous prime is 61306979309. The next prime is 61306979369. The reversal of 61306979311 is 11397960316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61306979311 - 2¹ = 61306979309 is a prime.

Together with 61306979309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61306973311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30653489655 + 30653489656.

It is an arithmetic number, because the mean of its divisors is an integer number (30653489656).

Almost surely, 2^61306979311 is an apocalyptic number.

61306979311 is a deficient number, since it is larger than the sum of its proper divisors (1).

61306979311 is an equidigital number, since it uses as much as digits as its factorization.

61306979311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 46.

The spelling of 61306979311 in words is "sixty-one billion, three hundred six million, nine hundred seventy-nine thousand, three hundred eleven".