1642746537 has 12 divisors (see below), whose sum is σ = 2374802820. Its totient is φ = 1094265888.

The previous prime is 1642746529. The next prime is 1642746577. The reversal of 1642746537 is 7356472461.

1642746537 is a `hidden beast` number, since 1 + 6 + 42 + 74 + 6 + 537 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 736796736 + 905949801 = 27144^2 + 30099^2 .

It is not a de Polignac number, because 1642746537 - 2³ = 1642746529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642746492 and 1642746501.

It is not an unprimeable number, because it can be changed into a prime (1642746527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63198 + ... + 85319.

It is an arithmetic number, because the mean of its divisors is an integer number (197900235).

Almost surely, 2^1642746537 is an apocalyptic number.

It is an amenable number.

1642746537 is a deficient number, since it is larger than the sum of its proper divisors (732056283).

1642746537 is a wasteful number, since it uses less digits than its factorization.

1642746537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149752 (or 149749 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 1642746537 is about 40530.8097254422. The cubic root of 1642746537 is about 1179.9316576813.

The spelling of 1642746537 in words is "one billion, six hundred forty-two million, seven hundred forty-six thousand, five hundred thirty-seven".