61534754243 has 4 divisors (see below), whose sum is σ = 62543520768. Its totient is φ = 60525987720.

The previous prime is 61534754213. The next prime is 61534754251. The reversal of 61534754243 is 34245743516.

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 61534754243 - 2²² = 61530559939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61534754194 and 61534754203.

It is not an unprimeable number, because it can be changed into a prime (61534754213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504383171 + ... + 504383292.

It is an arithmetic number, because the mean of its divisors is an integer number (15635880192).

Almost surely, 2^61534754243 is an apocalyptic number.

61534754243 is a deficient number, since it is larger than the sum of its proper divisors (1008766525).

61534754243 is a wasteful number, since it uses less digits than its factorization.

61534754243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008766524.

The product of its digits is 1209600, while the sum is 44.

The spelling of 61534754243 in words is "sixty-one billion, five hundred thirty-four million, seven hundred fifty-four thousand, two hundred forty-three".