42512749668 has 48 divisors (see below), whose sum is σ = 110637394560. Its totient is φ = 14117025312.

The previous prime is 42512749639. The next prime is 42512749681. The reversal of 42512749668 is 86694721524.

42512749668 is a `hidden beast` number, since 4 + 25 + 127 + 496 + 6 + 8 = 666.

42512749668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42512749668² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719955 + ... + 776762.

It is an arithmetic number, because the mean of its divisors is an integer number (2304945720).

Almost surely, 2^42512749668 is an apocalyptic number.

It is an amenable number.

42512749668 is an abundant number, since it is smaller than the sum of its proper divisors (68124644892).

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

42512749668 is a wasteful number, since it uses less digits than its factorization.

42512749668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496993 (or 1496985 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 42512749668 in words is "forty-two billion, five hundred twelve million, seven hundred forty-nine thousand, six hundred sixty-eight".