61161344213672 has 64 divisors (see below), whose sum is σ = 123172154150400. Its totient is φ = 28367803791360.

The previous prime is 61161344213663. The next prime is 61161344213677. The reversal of 61161344213672 is 27631244316116.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61161344213677) 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, 12145847 + ... + 16426937.

It is an arithmetic number, because the mean of its divisors is an integer number (1924564908600).

Almost surely, 2^{61161344213672} is an apocalyptic number.

It is an amenable number.

61161344213672 is an abundant number, since it is smaller than the sum of its proper divisors (62010809936728).

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

61161344213672 is a wasteful number, since it uses less digits than its factorization.

61161344213672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282626 (or 4282622 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

Adding to 61161344213672 its reverse (27631244316116), we get a palindrome (88792588529788).

The spelling of 61161344213672 in words is "sixty-one trillion, one hundred sixty-one billion, three hundred forty-four million, two hundred thirteen thousand, six hundred seventy-two".