42049780123 has 6 divisors (see below), whose sum is σ = 45533194044. Its totient is φ = 38815181496.

The previous prime is 42049780111. The next prime is 42049780133. The reversal of 42049780123 is 32108794024.

It is not a de Polignac number, because 42049780123 - 2¹⁷ = 42049649051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42049780103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124407465 + ... + 124407802.

It is an arithmetic number, because the mean of its divisors is an integer number (7588865674).

Almost surely, 2^42049780123 is an apocalyptic number.

42049780123 is a deficient number, since it is larger than the sum of its proper divisors (3483413921).

42049780123 is a wasteful number, since it uses less digits than its factorization.

42049780123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248815293 (or 248815280 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 42049780123 in words is "forty-two billion, forty-nine million, seven hundred eighty thousand, one hundred twenty-three".