42705799660861 has 16 divisors (see below), whose sum is σ = 44192251474560. Its totient is φ = 41220272761920.

The previous prime is 42705799660847. The next prime is 42705799660871. The reversal of 42705799660861 is 16806699750724.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42705799660861 - 2⁵ = 42705799660829 is a prime.

It is a super-2 number, since 2×42705799660861² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42705799660871) 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, 1536000186 + ... + 1536027988.

It is an arithmetic number, because the mean of its divisors is an integer number (2762015717160).

Almost surely, 2^{42705799660861} is an apocalyptic number.

It is an amenable number.

42705799660861 is a deficient number, since it is larger than the sum of its proper divisors (1486451813699).

42705799660861 is a wasteful number, since it uses less digits than its factorization.

42705799660861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42516.

The product of its (nonzero) digits is 274337280, while the sum is 70.

The spelling of 42705799660861 in words is "forty-two trillion, seven hundred five billion, seven hundred ninety-nine million, six hundred sixty thousand, eight hundred sixty-one".