2154477956783 has 2 divisors, whose sum is σ = 2154477956784. Its totient is φ = 2154477956782.

The previous prime is 2154477956759. The next prime is 2154477956849. The reversal of 2154477956783 is 3876597744512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2154477956783 - 2²² = 2154473762479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154477956713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077238978391 + 1077238978392.

It is an arithmetic number, because the mean of its divisors is an integer number (1077238978392).

Almost surely, 2^{2154477956783} is an apocalyptic number.

2154477956783 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154477956783 is an equidigital number, since it uses as much as digits as its factorization.

2154477956783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 355622400, while the sum is 68.

The spelling of 2154477956783 in words is "two trillion, one hundred fifty-four billion, four hundred seventy-seven million, nine hundred fifty-six thousand, seven hundred eighty-three".