61616628727 has 2 divisors, whose sum is σ = 61616628728. Its totient is φ = 61616628726.

The previous prime is 61616628659. The next prime is 61616628839. The reversal of 61616628727 is 72782661616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61616628727 - 2²³ = 61608240119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61646628727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30808314363 + 30808314364.

It is an arithmetic number, because the mean of its divisors is an integer number (30808314364).

Almost surely, 2^61616628727 is an apocalyptic number.

61616628727 is a deficient number, since it is larger than the sum of its proper divisors (1).

61616628727 is an equidigital number, since it uses as much as digits as its factorization.

61616628727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The spelling of 61616628727 in words is "sixty-one billion, six hundred sixteen million, six hundred twenty-eight thousand, seven hundred twenty-seven".