54491156761543 has 2 divisors, whose sum is σ = 54491156761544. Its totient is φ = 54491156761542.

The previous prime is 54491156761523. The next prime is 54491156761607. The reversal of 54491156761543 is 34516765119445.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54491156761543 - 2⁵ = 54491156761511 is a prime.

It is a super-2 number, since 2×54491156761543² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54491156761523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27245578380771 + 27245578380772.

It is an arithmetic number, because the mean of its divisors is an integer number (27245578380772).

Almost surely, 2^{54491156761543} is an apocalyptic number.

54491156761543 is a deficient number, since it is larger than the sum of its proper divisors (1).

54491156761543 is an equidigital number, since it uses as much as digits as its factorization.

54491156761543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432000, while the sum is 61.

The spelling of 54491156761543 in words is "fifty-four trillion, four hundred ninety-one billion, one hundred fifty-six million, seven hundred sixty-one thousand, five hundred forty-three".