61755462187 has 4 divisors (see below), whose sum is σ = 61802858320. Its totient is φ = 61708066056.

The previous prime is 61755462151. The next prime is 61755462193. The reversal of 61755462187 is 78126455716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61755462187 - 2¹¹ = 61755460139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61755469187) 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 3 ways as a sum of consecutive naturals, for example, 23696112 + ... + 23698717.

It is an arithmetic number, because the mean of its divisors is an integer number (15450714580).

Almost surely, 2^61755462187 is an apocalyptic number.

61755462187 is a deficient number, since it is larger than the sum of its proper divisors (47396133).

61755462187 is a wasteful number, since it uses less digits than its factorization.

61755462187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47396132.

The product of its digits is 2822400, while the sum is 52.

The spelling of 61755462187 in words is "sixty-one billion, seven hundred fifty-five million, four hundred sixty-two thousand, one hundred eighty-seven".