61844550931 has 2 divisors, whose sum is σ = 61844550932. Its totient is φ = 61844550930.

The previous prime is 61844550871. The next prime is 61844550959. The reversal of 61844550931 is 13905544816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61844550931 - 2¹⁵ = 61844518163 is a prime.

It is a super-2 number, since 2×61844550931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61844550731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30922275465 + 30922275466.

It is an arithmetic number, because the mean of its divisors is an integer number (30922275466).

Almost surely, 2^61844550931 is an apocalyptic number.

61844550931 is a deficient number, since it is larger than the sum of its proper divisors (1).

61844550931 is an equidigital number, since it uses as much as digits as its factorization.

61844550931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 61844550931 in words is "sixty-one billion, eight hundred forty-four million, five hundred fifty thousand, nine hundred thirty-one".