61286875237 has 4 divisors (see below), whose sum is σ = 70042143136. Its totient is φ = 52531607340.

The previous prime is 61286875231. The next prime is 61286875297. The reversal of 61286875237 is 73257868216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61286875237 - 2³ = 61286875229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61286875231) 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, 4377633939 + ... + 4377633952.

It is an arithmetic number, because the mean of its divisors is an integer number (17510535784).

Almost surely, 2^61286875237 is an apocalyptic number.

It is an amenable number.

61286875237 is a deficient number, since it is larger than the sum of its proper divisors (8755267899).

61286875237 is an equidigital number, since it uses as much as digits as its factorization.

61286875237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755267898.

The product of its digits is 6773760, while the sum is 55.

The spelling of 61286875237 in words is "sixty-one billion, two hundred eighty-six million, eight hundred seventy-five thousand, two hundred thirty-seven".