61487435871 has 12 divisors (see below), whose sum is σ = 92676715248. Its totient is φ = 39209379264.

The previous prime is 61487435869. The next prime is 61487435897. The reversal of 61487435871 is 17853478416.

61487435871 is a `hidden beast` number, since 6 + 1 + 487 + 43 + 58 + 71 = 666.

It is not a de Polignac number, because 61487435871 - 2¹ = 61487435869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61487435851) 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, 148520170 + ... + 148520583.

It is an arithmetic number, because the mean of its divisors is an integer number (7723059604).

Almost surely, 2^61487435871 is an apocalyptic number.

61487435871 is a deficient number, since it is larger than the sum of its proper divisors (31189279377).

61487435871 is a wasteful number, since it uses less digits than its factorization.

61487435871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297040782 (or 297040779 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 61487435871 in words is "sixty-one billion, four hundred eighty-seven million, four hundred thirty-five thousand, eight hundred seventy-one".