61655006649 has 32 divisors (see below), whose sum is σ = 91297753344. Its totient is φ = 36811653120.

The previous prime is 61655006627. The next prime is 61655006657. The reversal of 61655006649 is 94660055616.

It is not a de Polignac number, because 61655006649 - 2⁵ = 61655006617 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 61655006598 and 61655006607.

It is not an unprimeable number, because it can be changed into a prime (61655006249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90219 + ... + 362559.

It is an arithmetic number, because the mean of its divisors is an integer number (2853054792).

Almost surely, 2^61655006649 is an apocalyptic number.

61655006649 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

61655006649 is a deficient number, since it is larger than the sum of its proper divisors (29642746695).

61655006649 is a wasteful number, since it uses less digits than its factorization.

61655006649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272577.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 61655006649 in words is "sixty-one billion, six hundred fifty-five million, six thousand, six hundred forty-nine".