61765648045 has 4 divisors (see below), whose sum is σ = 74118777660. Its totient is φ = 49412518432.

The previous prime is 61765648037. The next prime is 61765648051. The reversal of 61765648045 is 54084656716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43483092676 + 18282555369 = 208526^2 + 135213^2 .

It is a cyclic number.

It is not a de Polignac number, because 61765648045 - 2³ = 61765648037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61765647983 and 61765648001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6176564800 + ... + 6176564809.

It is an arithmetic number, because the mean of its divisors is an integer number (18529694415).

Almost surely, 2^61765648045 is an apocalyptic number.

It is an amenable number.

61765648045 is a deficient number, since it is larger than the sum of its proper divisors (12353129615).

61765648045 is a wasteful number, since it uses less digits than its factorization.

61765648045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12353129614.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 61765648045 in words is "sixty-one billion, seven hundred sixty-five million, six hundred forty-eight thousand, forty-five".