1942574661 has 6 divisors (see below), whose sum is σ = 2805941190. Its totient is φ = 1295049768.

The previous prime is 1942574653. The next prime is 1942574663. The reversal of 1942574661 is 1664752491.

1942574661 is a `hidden beast` number, since 19 + 4 + 2 + 574 + 6 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1805825025 + 136749636 = 42495^2 + 11694^2 .

It is not a de Polignac number, because 1942574661 - 2³ = 1942574653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942574663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107920806 + ... + 107920823.

It is an arithmetic number, because the mean of its divisors is an integer number (467656865).

Almost surely, 2^1942574661 is an apocalyptic number.

It is an amenable number.

1942574661 is a deficient number, since it is larger than the sum of its proper divisors (863366529).

1942574661 is a wasteful number, since it uses less digits than its factorization.

1942574661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215841635 (or 215841632 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1942574661 is about 44074.6487337109. The cubic root of 1942574661 is about 1247.7451961466.

The spelling of 1942574661 in words is "one billion, nine hundred forty-two million, five hundred seventy-four thousand, six hundred sixty-one".