61493288805 has 40 divisors (see below), whose sum is σ = 118711840632. Its totient is φ = 30273616512.

The previous prime is 61493288771. The next prime is 61493288821. The reversal of 61493288805 is 50888239416.

61493288805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7245754884 + 54247533921 = 85122^2 + 232911^2 .

It is not a de Polignac number, because 61493288805 - 2¹² = 61493284709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5834554 + ... + 5845083.

Almost surely, 2^61493288805 is an apocalyptic number.

61493288805 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61493288805 is a deficient number, since it is larger than the sum of its proper divisors (57218551827).

61493288805 is a wasteful number, since it uses less digits than its factorization.

61493288805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11679667 (or 11679658 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 61493288805 in words is "sixty-one billion, four hundred ninety-three million, two hundred eighty-eight thousand, eight hundred five".