42278761924 has 81 divisors (see below), whose sum is σ = 90953423757. Its totient is φ = 17143606368.

The previous prime is 42278761919. The next prime is 42278761927. The reversal of 42278761924 is 42916787224.

The square root of 42278761924 is 205618.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2690496900 + 39588265024 = 51870^2 + 198968^2 .

It is not an unprimeable number, because it can be changed into a prime (42278761927) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 54694002 + ... + 54694774.

Almost surely, 2^42278761924 is an apocalyptic number.

42278761924 is the 205618-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42278761924

42278761924 is an abundant number, since it is smaller than the sum of its proper divisors (48674661833).

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

42278761924 is an equidigital number, since it uses as much as digits as its factorization.

42278761924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602 (or 801 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The spelling of 42278761924 in words is "forty-two billion, two hundred seventy-eight million, seven hundred sixty-one thousand, nine hundred twenty-four".