42129187740 has 72 divisors (see below), whose sum is σ = 129227782320. Its totient is φ = 11108216064.

The previous prime is 42129187729. The next prime is 42129187769. The reversal of 42129187740 is 4778192124.

42129187740 is a `hidden beast` number, since 421 + 2 + 9 + 187 + 7 + 40 = 666.

42129187740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1298874 + ... + 1330913.

It is an arithmetic number, because the mean of its divisors is an integer number (1794830310).

Almost surely, 2^42129187740 is an apocalyptic number.

It is an amenable number.

42129187740 is an abundant number, since it is smaller than the sum of its proper divisors (87098594580).

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

42129187740 is a wasteful number, since it uses less digits than its factorization.

42129187740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629891 (or 2629886 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 42129187740 in words is "forty-two billion, one hundred twenty-nine million, one hundred eighty-seven thousand, seven hundred forty".