61531706723 has 8 divisors (see below), whose sum is σ = 61668853392. Its totient is φ = 61394651136.

The previous prime is 61531706713. The next prime is 61531706741. The reversal of 61531706723 is 32760713516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61531706723 - 2¹⁰ = 61531705699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61531706713) 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 7 ways as a sum of consecutive naturals, for example, 1432211 + ... + 1474547.

It is an arithmetic number, because the mean of its divisors is an integer number (7708606674).

Almost surely, 2^61531706723 is an apocalyptic number.

61531706723 is a deficient number, since it is larger than the sum of its proper divisors (137146669).

61531706723 is a wasteful number, since it uses less digits than its factorization.

61531706723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45541.

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 61531706723 in words is "sixty-one billion, five hundred thirty-one million, seven hundred six thousand, seven hundred twenty-three".