42777772765 has 16 divisors (see below), whose sum is σ = 63179480448. Its totient is φ = 27076919616.

The previous prime is 42777772753. The next prime is 42777772769. The reversal of 42777772765 is 56727777724.

It is a happy number.

42777772765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42777772765 - 2⁷ = 42777772637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42777772769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47008087 + ... + 47008996.

It is an arithmetic number, because the mean of its divisors is an integer number (3948717528).

Almost surely, 2^42777772765 is an apocalyptic number.

It is an amenable number.

42777772765 is a deficient number, since it is larger than the sum of its proper divisors (20401707683).

42777772765 is a wasteful number, since it uses less digits than its factorization.

42777772765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94017108.

The product of its digits is 56471520, while the sum is 61.

The spelling of 42777772765 in words is "forty-two billion, seven hundred seventy-seven million, seven hundred seventy-two thousand, seven hundred sixty-five".