61031986319673 has 12 divisors (see below), whose sum is σ = 88966096267620. Its totient is φ = 40314706559136.

The previous prime is 61031986319663. The next prime is 61031986319741. The reversal of 61031986319673 is 37691368913016.

61031986319673 is a `hidden beast` number, since 6 + 1 + 0 + 319 + 8 + 63 + 196 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35486361303849 + 25545625015824 = 5957043^2 + 5054268^2 .

It is not a de Polignac number, because 61031986319673 - 2⁸ = 61031986319417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61031986319673.

It is not an unprimeable number, because it can be changed into a prime (61031986319663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31107025686 + ... + 31107027647.

It is an arithmetic number, because the mean of its divisors is an integer number (7413841355635).

Almost surely, 2^{61031986319673} is an apocalyptic number.

It is an amenable number.

61031986319673 is a deficient number, since it is larger than the sum of its proper divisors (27934109947947).

61031986319673 is a wasteful number, since it uses less digits than its factorization.

61031986319673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62214053448 (or 62214053445 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 63.

The spelling of 61031986319673 in words is "sixty-one trillion, thirty-one billion, nine hundred eighty-six million, three hundred nineteen thousand, six hundred seventy-three".