42681340685762 has 4 divisors (see below), whose sum is σ = 64022011028646. Its totient is φ = 21340670342880.

The previous prime is 42681340685749. The next prime is 42681340685821. The reversal of 42681340685762 is 26758604318624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34352973821881 + 8328366863881 = 5861141^2 + 2885891^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42681340685695 and 42681340685704.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10670335171439 + ... + 10670335171442.

Almost surely, 2^{42681340685762} is an apocalyptic number.

42681340685762 is a deficient number, since it is larger than the sum of its proper divisors (21340670342884).

42681340685762 is a wasteful number, since it uses less digits than its factorization.

42681340685762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21340670342883.

The product of its (nonzero) digits is 92897280, while the sum is 62.

The spelling of 42681340685762 in words is "forty-two trillion, six hundred eighty-one billion, three hundred forty million, six hundred eighty-five thousand, seven hundred sixty-two".