2154707577647 has 2 divisors, whose sum is σ = 2154707577648. Its totient is φ = 2154707577646.

The previous prime is 2154707577629. The next prime is 2154707577683. The reversal of 2154707577647 is 7467757074512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2154707577647 - 2³⁰ = 2153633835823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154707577647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154707577947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077353788823 + 1077353788824.

It is an arithmetic number, because the mean of its divisors is an integer number (1077353788824).

Almost surely, 2^{2154707577647} is an apocalyptic number.

2154707577647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154707577647 is an equidigital number, since it uses as much as digits as its factorization.

2154707577647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80673600, while the sum is 62.

The spelling of 2154707577647 in words is "two trillion, one hundred fifty-four billion, seven hundred seven million, five hundred seventy-seven thousand, six hundred forty-seven".