2154965939767 has 2 divisors, whose sum is σ = 2154965939768. Its totient is φ = 2154965939766.

The previous prime is 2154965939759. The next prime is 2154965939801. The reversal of 2154965939767 is 7679395694512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2154965939767 - 2³ = 2154965939759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154965939767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154965939167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077482969883 + 1077482969884.

It is an arithmetic number, because the mean of its divisors is an integer number (1077482969884).

Almost surely, 2^{2154965939767} is an apocalyptic number.

2154965939767 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154965939767 is an equidigital number, since it uses as much as digits as its factorization.

2154965939767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 771573600, while the sum is 73.

The spelling of 2154965939767 in words is "two trillion, one hundred fifty-four billion, nine hundred sixty-five million, nine hundred thirty-nine thousand, seven hundred sixty-seven".