42749155620 has 192 divisors, whose sum is σ = 143257927680. Its totient is φ = 10552291200.

The previous prime is 42749155619. The next prime is 42749155661. The reversal of 42749155620 is 2655194724.

42749155620 is a `hidden beast` number, since 4 + 2 + 7 + 4 + 9 + 15 + 5 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 329505 + ... + 440535.

It is an arithmetic number, because the mean of its divisors is an integer number (746135040).

Almost surely, 2^42749155620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42749155620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71628963840).

42749155620 is an abundant number, since it is smaller than the sum of its proper divisors (100508772060).

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

42749155620 is a wasteful number, since it uses less digits than its factorization.

42749155620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111103 (or 111095 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 42749155620 in words is "forty-two billion, seven hundred forty-nine million, one hundred fifty-five thousand, six hundred twenty".