42762781656 has 80 divisors (see below), whose sum is σ = 136886167440. Its totient is φ = 12217936320.

The previous prime is 42762781651. The next prime is 42762781669. The reversal of 42762781656 is 65618726724.

It is a happy number.

42762781656 is a `hidden beast` number, since 4 + 2 + 7 + 627 + 8 + 1 + 6 + 5 + 6 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42762781651) 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 19 ways as a sum of consecutive naturals, for example, 4709175 + ... + 4718246.

It is an arithmetic number, because the mean of its divisors is an integer number (1711077093).

Almost surely, 2^42762781656 is an apocalyptic number.

It is an amenable number.

42762781656 is an abundant number, since it is smaller than the sum of its proper divisors (94123385784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42762781656 is a wasteful number, since it uses less digits than its factorization.

42762781656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9427446 (or 9427433 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 42762781656 in words is "forty-two billion, seven hundred sixty-two million, seven hundred eighty-one thousand, six hundred fifty-six".