61231982361 has 12 divisors (see below), whose sum is σ = 89739434736. Its totient is φ = 37110292120.

The previous prime is 61231982353. The next prime is 61231982363. The reversal of 61231982361 is 16328913216.

It is not a de Polignac number, because 61231982361 - 2³ = 61231982353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61231982363) 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 in 11 ways as a sum of consecutive naturals, for example, 84341211 + ... + 84341936.

It is an arithmetic number, because the mean of its divisors is an integer number (7478286228).

Almost surely, 2^61231982361 is an apocalyptic number.

It is an amenable number.

61231982361 is a deficient number, since it is larger than the sum of its proper divisors (28507452375).

61231982361 is a wasteful number, since it uses less digits than its factorization.

61231982361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168683172 (or 168683161 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The spelling of 61231982361 in words is "sixty-one billion, two hundred thirty-one million, nine hundred eighty-two thousand, three hundred sixty-one".