61661241623452 has 48 divisors (see below), whose sum is σ = 111437327232000. Its totient is φ = 29838722120064.

The previous prime is 61661241623369. The next prime is 61661241623479. The reversal of 61661241623452 is 25432614216616.

It is a junction number, because it is equal to n+sod(n) for n = 61661241623396 and 61661241623405.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26704824 + ... + 28921792.

It is an arithmetic number, because the mean of its divisors is an integer number (2321610984000).

Almost surely, 2^{61661241623452} is an apocalyptic number.

It is an amenable number.

61661241623452 is a deficient number, since it is larger than the sum of its proper divisors (49776085608548).

61661241623452 is a wasteful number, since it uses less digits than its factorization.

61661241623452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218858 (or 2218856 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 49.

The spelling of 61661241623452 in words is "sixty-one trillion, six hundred sixty-one billion, two hundred forty-one million, six hundred twenty-three thousand, four hundred fifty-two".