61028836765 has 16 divisors (see below), whose sum is σ = 79591604400. Its totient is φ = 44653980672.

The previous prime is 61028836747. The next prime is 61028836769. The reversal of 61028836765 is 56763882016.

It can be written as a sum of positive squares in 8 ways, for example, as 113167044 + 60915669721 = 10638^2 + 246811^2 .

It is a cyclic number.

It is not a de Polignac number, because 61028836765 - 2⁷ = 61028836637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61028836769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4299820 + ... + 4313989.

It is an arithmetic number, because the mean of its divisors is an integer number (4974475275).

Almost surely, 2^61028836765 is an apocalyptic number.

61028836765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61028836765 is a deficient number, since it is larger than the sum of its proper divisors (18562767635).

61028836765 is a wasteful number, since it uses less digits than its factorization.

61028836765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8613936.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 61028836765 in words is "sixty-one billion, twenty-eight million, eight hundred thirty-six thousand, seven hundred sixty-five".