61731126132 has 24 divisors (see below), whose sum is σ = 155119240416. Its totient is φ = 18994192608.

The previous prime is 61731126131. The next prime is 61731126173. The reversal of 61731126132 is 23162113716.

It is a junction number, because it is equal to n+sod(n) for n = 61731126093 and 61731126102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61731126131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197856018 + ... + 197856329.

It is an arithmetic number, because the mean of its divisors is an integer number (6463301684).

Almost surely, 2^61731126132 is an apocalyptic number.

It is an amenable number.

61731126132 is an abundant number, since it is smaller than the sum of its proper divisors (93388114284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61731126132 is a wasteful number, since it uses less digits than its factorization.

61731126132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395712367 (or 395712365 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

Adding to 61731126132 its reverse (23162113716), we get a palindrome (84893239848).

The spelling of 61731126132 in words is "sixty-one billion, seven hundred thirty-one million, one hundred twenty-six thousand, one hundred thirty-two".