39840964654177 has 2 divisors, whose sum is σ = 39840964654178. Its totient is φ = 39840964654176.

The previous prime is 39840964654157. The next prime is 39840964654219. The reversal of 39840964654177 is 77145646904893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37563856492096 + 2277108162081 = 6128936^2 + 1509009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39840964654177 is a prime.

It is not a weakly prime, because it can be changed into another prime (39840964654157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19920482327088 + 19920482327089.

It is an arithmetic number, because the mean of its divisors is an integer number (19920482327089).

Almost surely, 2^{39840964654177} is an apocalyptic number.

It is an amenable number.

39840964654177 is a deficient number, since it is larger than the sum of its proper divisors (1).

39840964654177 is an equidigital number, since it uses as much as digits as its factorization.

39840964654177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1097349120, while the sum is 73.

The spelling of 39840964654177 in words is "thirty-nine trillion, eight hundred forty billion, nine hundred sixty-four million, six hundred fifty-four thousand, one hundred seventy-seven".