561770077 has 4 divisors (see below), whose sum is σ = 612840096. Its totient is φ = 510700060.

The previous prime is 561770059. The next prime is 561770119. The reversal of 561770077 is 770077165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561770077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561770177) 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 3 ways as a sum of consecutive naturals, for example, 25534993 + ... + 25535014.

It is an arithmetic number, because the mean of its divisors is an integer number (153210024).

Almost surely, 2^561770077 is an apocalyptic number.

It is an amenable number.

561770077 is a deficient number, since it is larger than the sum of its proper divisors (51070019).

561770077 is a wasteful number, since it uses less digits than its factorization.

561770077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51070018.

The product of its (nonzero) digits is 72030, while the sum is 40.

The square root of 561770077 is about 23701.6893279783. The cubic root of 561770077 is about 825.1245980163.

The spelling of 561770077 in words is "five hundred sixty-one million, seven hundred seventy thousand, seventy-seven".