61275138423 has 4 divisors (see below), whose sum is σ = 81700184568. Its totient is φ = 40850092280.

The previous prime is 61275138383. The next prime is 61275138427. The reversal of 61275138423 is 32483157216.

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 61275138423 - 2⁶ = 61275138359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61275138427) 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, 10212523068 + ... + 10212523073.

It is an arithmetic number, because the mean of its divisors is an integer number (20425046142).

Almost surely, 2^61275138423 is an apocalyptic number.

61275138423 is a deficient number, since it is larger than the sum of its proper divisors (20425046145).

61275138423 is a wasteful number, since it uses less digits than its factorization.

61275138423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20425046144.

The product of its digits is 241920, while the sum is 42.

The spelling of 61275138423 in words is "sixty-one billion, two hundred seventy-five million, one hundred thirty-eight thousand, four hundred twenty-three".