1641797426 has 8 divisors (see below), whose sum is σ = 2462870124. Its totient is φ = 820840720.

The previous prime is 1641797419. The next prime is 1641797461. The reversal of 1641797426 is 6247971461.

It can be written as a sum of positive squares in 2 ways, for example, as 1474483201 + 167314225 = 38399^2 + 12935^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32336 + ... + 65796.

Almost surely, 2^1641797426 is an apocalyptic number.

1641797426 is a deficient number, since it is larger than the sum of its proper divisors (821072698).

1641797426 is a wasteful number, since it uses less digits than its factorization.

1641797426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57996.

The product of its digits is 508032, while the sum is 47.

The square root of 1641797426 is about 40519.0995210901. The cubic root of 1641797426 is about 1179.7043753355.

The spelling of 1641797426 in words is "one billion, six hundred forty-one million, seven hundred ninety-seven thousand, four hundred twenty-six".