61310040243 has 8 divisors (see below), whose sum is σ = 81749760000. Its totient is φ = 40871840328.

The previous prime is 61310040217. The next prime is 61310040257. The reversal of 61310040243 is 34204001316.

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

It is not a de Polignac number, because 61310040243 - 2⁶ = 61310040179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61310040283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282243 + ... + 449756.

It is an arithmetic number, because the mean of its divisors is an integer number (10218720000).

Almost surely, 2^61310040243 is an apocalyptic number.

61310040243 is a deficient number, since it is larger than the sum of its proper divisors (20439719757).

61310040243 is a wasteful number, since it uses less digits than its factorization.

61310040243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759921.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 61310040243 its reverse (34204001316), we get a palindrome (95514041559).

The spelling of 61310040243 in words is "sixty-one billion, three hundred ten million, forty thousand, two hundred forty-three".