61744573505 has 16 divisors (see below), whose sum is σ = 79315070400. Its totient is φ = 46002732480.

The previous prime is 61744573481. The next prime is 61744573519. The reversal of 61744573505 is 50537544716.

It is not a de Polignac number, because 61744573505 - 2¹² = 61744569409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61744573505.

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, 5502386 + ... + 5513595.

It is an arithmetic number, because the mean of its divisors is an integer number (4957191900).

Almost surely, 2^61744573505 is an apocalyptic number.

It is an amenable number.

61744573505 is a deficient number, since it is larger than the sum of its proper divisors (17570496895).

61744573505 is a wasteful number, since it uses less digits than its factorization.

61744573505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11016064.

The product of its (nonzero) digits is 1764000, while the sum is 47.

The spelling of 61744573505 in words is "sixty-one billion, seven hundred forty-four million, five hundred seventy-three thousand, five hundred five".