1640017913779 has 8 divisors (see below), whose sum is σ = 1984559492448. Its totient is φ = 1323039661440.

The previous prime is 1640017913777. The next prime is 1640017913791. The reversal of 1640017913779 is 9773197100461.

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

It is not a de Polignac number, because 1640017913779 - 2¹ = 1640017913777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640017913771) 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, 6890831452 + ... + 6890831689.

It is an arithmetic number, because the mean of its divisors is an integer number (248069936556).

Almost surely, 2^{1640017913779} is an apocalyptic number.

1640017913779 is a deficient number, since it is larger than the sum of its proper divisors (344541578669).

1640017913779 is a wasteful number, since it uses less digits than its factorization.

1640017913779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13781663165.

The product of its (nonzero) digits is 2000376, while the sum is 55.

The spelling of 1640017913779 in words is "one trillion, six hundred forty billion, seventeen million, nine hundred thirteen thousand, seven hundred seventy-nine".