61441605421 has 16 divisors (see below), whose sum is σ = 72667146240. Its totient is φ = 50829448320.

The previous prime is 61441605409. The next prime is 61441605451. The reversal of 61441605421 is 12450614416.

It is not a de Polignac number, because 61441605421 - 2¹¹ = 61441603373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61441605451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509236 + ... + 618226.

It is an arithmetic number, because the mean of its divisors is an integer number (4541696640).

Almost surely, 2^61441605421 is an apocalyptic number.

It is an amenable number.

61441605421 is a deficient number, since it is larger than the sum of its proper divisors (11225540819).

61441605421 is a wasteful number, since it uses less digits than its factorization.

61441605421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111804.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 61441605421 in words is "sixty-one billion, four hundred forty-one million, six hundred five thousand, four hundred twenty-one".