61727783345 has 8 divisors (see below), whose sum is σ = 74084237376. Its totient is φ = 49374961776.

The previous prime is 61727783323. The next prime is 61727783363. The reversal of 61727783345 is 54338772716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61727783345 - 2³⁰ = 60654041521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870587 + ... + 938816.

It is an arithmetic number, because the mean of its divisors is an integer number (9260529672).

Almost surely, 2^61727783345 is an apocalyptic number.

It is an amenable number.

61727783345 is a deficient number, since it is larger than the sum of its proper divisors (12356454031).

61727783345 is a wasteful number, since it uses less digits than its factorization.

61727783345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816231.

The product of its digits is 5927040, while the sum is 53.

The spelling of 61727783345 in words is "sixty-one billion, seven hundred twenty-seven million, seven hundred eighty-three thousand, three hundred forty-five".