1677856493041 has 3 divisors (see below), whose sum is σ = 1677857788363. Its totient is φ = 1677855197720.

The previous prime is 1677856493011. The next prime is 1677856493057. The reversal of 1677856493041 is 1403946587761.

It is a happy number.

The square root of 1677856493041 is 1295321.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 317274219441 + 1360582273600 = 563271^2 + 1166440^2 .

It is not a de Polignac number, because 1677856493041 - 2¹¹ = 1677856490993 is a prime.

It is a super-2 number, since 2×1677856493041² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1677856493011) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 647661 + ... + 1942981.

Almost surely, 2^{1677856493041} is an apocalyptic number.

1677856493041 is the 1295321-st square number.

1677856493041 is the 647661-st centered octagonal number.

It is an amenable number.

1677856493041 is a deficient number, since it is larger than the sum of its proper divisors (1295322).

1677856493041 is an frugal number, since it uses more digits than its factorization.

1677856493041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590642 (or 1295321 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 1677856493041 in words is "one trillion, six hundred seventy-seven billion, eight hundred fifty-six million, four hundred ninety-three thousand, forty-one".