61311489792 has 72 divisors (see below), whose sum is σ = 186489131136. Its totient is φ = 17517566976.

The previous prime is 61311489769. The next prime is 61311489793. The reversal of 61311489792 is 29798411316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61311489793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5696958 + ... + 5707709.

Almost surely, 2^61311489792 is an apocalyptic number.

It is an amenable number.

61311489792 is an abundant number, since it is smaller than the sum of its proper divisors (125177641344).

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

61311489792 is a wasteful number, since it uses less digits than its factorization.

61311489792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11404693 (or 11404679 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The spelling of 61311489792 in words is "sixty-one billion, three hundred eleven million, four hundred eighty-nine thousand, seven hundred ninety-two".