53661326717544 has 64 divisors (see below), whose sum is σ = 165111774522240. Its totient is φ = 14152437815040.

The previous prime is 53661326717521. The next prime is 53661326717561. The reversal of 53661326717544 is 44571762316635.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12285100087 + ... + 12285104454.

It is an arithmetic number, because the mean of its divisors is an integer number (2579871476910).

Almost surely, 2^{53661326717544} is an apocalyptic number.

It is an amenable number.

53661326717544 is an abundant number, since it is smaller than the sum of its proper divisors (111450447804696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53661326717544 is a wasteful number, since it uses less digits than its factorization.

53661326717544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24570204570 (or 24570204566 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 60.

The spelling of 53661326717544 in words is "fifty-three trillion, six hundred sixty-one billion, three hundred twenty-six million, seven hundred seventeen thousand, five hundred forty-four".