61671536758272 has 160 divisors (see below), whose sum is σ = 188010737114112. Its totient is φ = 17597641826304.

The previous prime is 61671536758213. The next prime is 61671536758313. The reversal of 61671536758272 is 27285763517616.

It is a super-2 number, since 2×61671536758272² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4601193 + ... + 12021399.

Almost surely, 2^{61671536758272} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61671536758272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94005368557056).

61671536758272 is an abundant number, since it is smaller than the sum of its proper divisors (126339200355840).

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

61671536758272 is an equidigital number, since it uses as much as digits as its factorization.

61671536758272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7421008 (or 7420992 counting only the distinct ones).

The product of its digits is 177811200, while the sum is 66.

The spelling of 61671536758272 in words is "sixty-one trillion, six hundred seventy-one billion, five hundred thirty-six million, seven hundred fifty-eight thousand, two hundred seventy-two".