42691438540 has 48 divisors (see below), whose sum is σ = 89984198304. Its totient is φ = 17013427200.

The previous prime is 42691438507. The next prime is 42691438541. The reversal of 42691438540 is 4583419624.

It is a super-2 number, since 2×42691438540² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42691438541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6487732 + ... + 6494308.

It is an arithmetic number, because the mean of its divisors is an integer number (1874670798).

Almost surely, 2^42691438540 is an apocalyptic number.

It is an amenable number.

42691438540 is an abundant number, since it is smaller than the sum of its proper divisors (47292759764).

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

42691438540 is a wasteful number, since it uses less digits than its factorization.

42691438540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7738 (or 7736 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 42691438540 in words is "forty-two billion, six hundred ninety-one million, four hundred thirty-eight thousand, five hundred forty".