61844550871 has 2 divisors, whose sum is σ = 61844550872. Its totient is φ = 61844550870.

The previous prime is 61844550863. The next prime is 61844550931. The reversal of 61844550871 is 17805544816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61844550871 - 2³ = 61844550863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61844550371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30922275435 + 30922275436.

It is an arithmetic number, because the mean of its divisors is an integer number (30922275436).

Almost surely, 2^61844550871 is an apocalyptic number.

61844550871 is a deficient number, since it is larger than the sum of its proper divisors (1).

61844550871 is an equidigital number, since it uses as much as digits as its factorization.

61844550871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 61844550871 in words is "sixty-one billion, eight hundred forty-four million, five hundred fifty thousand, eight hundred seventy-one".