61447991631044 has 12 divisors (see below), whose sum is σ = 107584211425068. Its totient is φ = 30709645509600.

The previous prime is 61447991630969. The next prime is 61447991631073. The reversal of 61447991631044 is 44013619974416.

It can be written as a sum of positive squares in 2 ways, for example, as 60439553906944 + 1008437724100 = 7774288^2 + 1004210^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3587566847 + ... + 3587583974.

It is an arithmetic number, because the mean of its divisors is an integer number (8965350952089).

Almost surely, 2^{61447991631044} is an apocalyptic number.

It is an amenable number.

61447991631044 is a deficient number, since it is larger than the sum of its proper divisors (46136219794024).

61447991631044 is a wasteful number, since it uses less digits than its factorization.

61447991631044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7175152966 (or 7175152964 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 59.

The spelling of 61447991631044 in words is "sixty-one trillion, four hundred forty-seven billion, nine hundred ninety-one million, six hundred thirty-one thousand, forty-four".