1640678098177 has 2 divisors, whose sum is σ = 1640678098178. Its totient is φ = 1640678098176.

The previous prime is 1640678098159. The next prime is 1640678098183. The reversal of 1640678098177 is 7718908760461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 956883065616 + 683795032561 = 978204^2 + 826919^2 .

It is an emirp because it is prime and its reverse (7718908760461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1640678098177 - 2¹⁵ = 1640678065409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1640678093177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820339049088 + 820339049089.

It is an arithmetic number, because the mean of its divisors is an integer number (820339049089).

Almost surely, 2^{1640678098177} is an apocalyptic number.

It is an amenable number.

1640678098177 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640678098177 is an equidigital number, since it uses as much as digits as its factorization.

1640678098177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28449792, while the sum is 64.

The spelling of 1640678098177 in words is "one trillion, six hundred forty billion, six hundred seventy-eight million, ninety-eight thousand, one hundred seventy-seven".