61844940427 has 2 divisors, whose sum is σ = 61844940428. Its totient is φ = 61844940426.

The previous prime is 61844940401. The next prime is 61844940439. The reversal of 61844940427 is 72404944816.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61844940427 is a prime.

It is not a weakly prime, because it can be changed into another prime (61844970427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30922470213 + 30922470214.

It is an arithmetic number, because the mean of its divisors is an integer number (30922470214).

Almost surely, 2^61844940427 is an apocalyptic number.

61844940427 is a deficient number, since it is larger than the sum of its proper divisors (1).

61844940427 is an equidigital number, since it uses as much as digits as its factorization.

61844940427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 61844940427 in words is "sixty-one billion, eight hundred forty-four million, nine hundred forty thousand, four hundred twenty-seven".