61827938065 has 8 divisors (see below), whose sum is σ = 76586865408. Its totient is φ = 47866790640.

The previous prime is 61827938063. The next prime is 61827938077. The reversal of 61827938065 is 56083972816.

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

It is not a de Polignac number, because 61827938065 - 2¹ = 61827938063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61827937997 and 61827938015.

It is not an unprimeable number, because it can be changed into a prime (61827938063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199444807 + ... + 199445116.

It is an arithmetic number, because the mean of its divisors is an integer number (9573358176).

Almost surely, 2^61827938065 is an apocalyptic number.

It is an amenable number.

61827938065 is a deficient number, since it is larger than the sum of its proper divisors (14758927343).

61827938065 is a wasteful number, since it uses less digits than its factorization.

61827938065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398889959.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 61827938065 in words is "sixty-one billion, eight hundred twenty-seven million, nine hundred thirty-eight thousand, sixty-five".