42691411161 has 27 divisors (see below), whose sum is σ = 71740478901. Its totient is φ = 24392612664.

The previous prime is 42691411129. The next prime is 42691411181. The reversal of 42691411161 is 16111419624.

The square root of 42691411161 is 206619.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 42691411161 - 2⁵ = 42691411129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42691411121) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4334080 + ... + 4343918.

Almost surely, 2^42691411161 is an apocalyptic number.

42691411161 is the 206619-th square number.

42691411161 is the 103310-th centered octagonal number.

It is an amenable number.

42691411161 is a deficient number, since it is larger than the sum of its proper divisors (29049067740).

42691411161 is an frugal number, since it uses more digits than its factorization.

42691411161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19698 (or 9849 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

Multiplying 42691411161 by its sum of digits (36), we get a square (1536890801796 = 1239714²).

The spelling of 42691411161 in words is "forty-two billion, six hundred ninety-one million, four hundred eleven thousand, one hundred sixty-one".