61726361772 has 48 divisors (see below), whose sum is σ = 144656265600. Its totient is φ = 20485804032.

The previous prime is 61726361771. The next prime is 61726361783. The reversal of 61726361772 is 27716362716.

It is not an unprimeable number, because it can be changed into a prime (61726361771) 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 15 ways as a sum of consecutive naturals, for example, 10171083 + ... + 10177149.

It is an arithmetic number, because the mean of its divisors is an integer number (3013672200).

Almost surely, 2^61726361772 is an apocalyptic number.

It is an amenable number.

61726361772 is an abundant number, since it is smaller than the sum of its proper divisors (82929903828).

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

61726361772 is a wasteful number, since it uses less digits than its factorization.

61726361772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9630 (or 9628 counting only the distinct ones).

The product of its digits is 889056, while the sum is 48.

The spelling of 61726361772 in words is "sixty-one billion, seven hundred twenty-six million, three hundred sixty-one thousand, seven hundred seventy-two".