61154336871 has 24 divisors (see below), whose sum is σ = 93003334320. Its totient is φ = 38615429376.

The previous prime is 61154336851. The next prime is 61154336891. The reversal of 61154336871 is 17863345116.

61154336871 is a `hidden beast` number, since 6 + 1 + 1 + 543 + 36 + 8 + 71 = 666.

It is an interprime number because it is at equal distance from previous prime (61154336851) and next prime (61154336891).

It is not a de Polignac number, because 61154336871 - 2¹⁹ = 61153812583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61154336851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 807295 + ... + 879791.

It is an arithmetic number, because the mean of its divisors is an integer number (3875138930).

Almost surely, 2^61154336871 is an apocalyptic number.

61154336871 is a deficient number, since it is larger than the sum of its proper divisors (31848997449).

61154336871 is a wasteful number, since it uses less digits than its factorization.

61154336871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77455 (or 77452 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 61154336871 in words is "sixty-one billion, one hundred fifty-four million, three hundred thirty-six thousand, eight hundred seventy-one".