42780147720 has 128 divisors (see below), whose sum is σ = 129953341440. Its totient is φ = 11265304320.

The previous prime is 42780147701. The next prime is 42780147757. The reversal of 42780147720 is 2774108724.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4531405 + ... + 4540835.

It is an arithmetic number, because the mean of its divisors is an integer number (1015260480).

Almost surely, 2^42780147720 is an apocalyptic number.

42780147720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42780147720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64976670720).

42780147720 is an abundant number, since it is smaller than the sum of its proper divisors (87173193720).

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

42780147720 is a wasteful number, since it uses less digits than its factorization.

42780147720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9915 (or 9911 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 42.

The spelling of 42780147720 in words is "forty-two billion, seven hundred eighty million, one hundred forty-seven thousand, seven hundred twenty".