6992471641 has 3 divisors (see below), whose sum is σ = 6992555263. Its totient is φ = 6992388020.

The previous prime is 6992471627. The next prime is 6992471657. The reversal of 6992471641 is 1461742996.

The square root of 6992471641 is 83621.

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., 6959063241 + 33408400 = 83421^2 + 5780^2 .

It is not a de Polignac number, because 6992471641 - 2¹¹ = 6992469593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6992471611) 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, 41811 + ... + 125431.

Almost surely, 2^6992471641 is an apocalyptic number.

6992471641 is the 83621-st square number.

6992471641 is the 41811-st centered octagonal number.

It is an amenable number.

6992471641 is a deficient number, since it is larger than the sum of its proper divisors (83622).

6992471641 is an frugal number, since it uses more digits than its factorization.

6992471641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167242 (or 83621 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The cubic root of 6992471641 is about 1912.2451637953.

Multiplying 6992471641 by its sum of digits (49), we get a square (342631110409 = 585347²).

The spelling of 6992471641 in words is "six billion, nine hundred ninety-two million, four hundred seventy-one thousand, six hundred forty-one".