61871341558016 has 36 divisors (see below), whose sum is σ = 123522709831500. Its totient is φ = 30930232246272.

The previous prime is 61871341558003. The next prime is 61871341558043. The reversal of 61871341558016 is 61085514317816.

It can be written as a sum of positive squares in 2 ways, for example, as 43421773830400 + 18449567727616 = 6589520^2 + 4295296^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19785041 + ... + 22697808.

Almost surely, 2^{61871341558016} is an apocalyptic number.

It is an amenable number.

61871341558016 is a deficient number, since it is larger than the sum of its proper divisors (61651368273484).

61871341558016 is an equidigital number, since it uses as much as digits as its factorization.

61871341558016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42488554 (or 42488540 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 61871341558016 in words is "sixty-one trillion, eight hundred seventy-one billion, three hundred forty-one million, five hundred fifty-eight thousand, sixteen".