61553102563243 has 8 divisors (see below), whose sum is σ = 64890573465600. Its totient is φ = 58300124595240.

The previous prime is 61553102563129. The next prime is 61553102563301. The reversal of 61553102563243 is 34236520135516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61553102563243 is a prime.

It is a super-2 number, since 2×61553102563243² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61553102563193 and 61553102563202.

It is not an unprimeable number, because it can be changed into a prime (61553102561243) 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, 21123232093 + ... + 21123235006.

It is an arithmetic number, because the mean of its divisors is an integer number (8111321683200).

Almost surely, 2^{61553102563243} is an apocalyptic number.

61553102563243 is a deficient number, since it is larger than the sum of its proper divisors (3337470902357).

61553102563243 is a wasteful number, since it uses less digits than its factorization.

61553102563243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42246467177.

The product of its (nonzero) digits is 1944000, while the sum is 46.

Adding to 61553102563243 its reverse (34236520135516), we get a palindrome (95789622698759).

The spelling of 61553102563243 in words is "sixty-one trillion, five hundred fifty-three billion, one hundred two million, five hundred sixty-three thousand, two hundred forty-three".