42779976720 has 80 divisors (see below), whose sum is σ = 142819317312. Its totient is φ = 10530455040.

The previous prime is 42779976713. The next prime is 42779976721. The reversal of 42779976720 is 2767997724.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (42779976721) 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, 6852646 + ... + 6858885.

Almost surely, 2^42779976720 is an apocalyptic number.

42779976720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42779976720 is an abundant number, since it is smaller than the sum of its proper divisors (100039340592).

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

42779976720 is a wasteful number, since it uses less digits than its factorization.

42779976720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13711560 (or 13711554 counting only the distinct ones).

The product of its (nonzero) digits is 18670176, while the sum is 60.

The spelling of 42779976720 in words is "forty-two billion, seven hundred seventy-nine million, nine hundred seventy-six thousand, seven hundred twenty".