1641768680949 has 8 divisors (see below), whose sum is σ = 2194652222880. Its totient is φ = 1091698796496.

The previous prime is 1641768680873. The next prime is 1641768681013. The reversal of 1641768680949 is 9490868671461.

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

It is not a de Polignac number, because 1641768680949 - 2¹² = 1641768676853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641768660949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703413007 + ... + 703415340.

It is an arithmetic number, because the mean of its divisors is an integer number (274331527860).

Almost surely, 2^{1641768680949} is an apocalyptic number.

It is an amenable number.

1641768680949 is a deficient number, since it is larger than the sum of its proper divisors (552883541931).

1641768680949 is a wasteful number, since it uses less digits than its factorization.

1641768680949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406828739.

The product of its (nonzero) digits is 125411328, while the sum is 69.

The spelling of 1641768680949 in words is "one trillion, six hundred forty-one billion, seven hundred sixty-eight million, six hundred eighty thousand, nine hundred forty-nine".