54981551461 has 2 divisors, whose sum is σ = 54981551462. Its totient is φ = 54981551460.

The previous prime is 54981551459. The next prime is 54981551503. The reversal of 54981551461 is 16415518945.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29063771361 + 25917780100 = 170481^2 + 160990^2 .

It is a cyclic number.

It is not a de Polignac number, because 54981551461 - 2¹ = 54981551459 is a prime.

Together with 54981551459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54981551161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27490775730 + 27490775731.

It is an arithmetic number, because the mean of its divisors is an integer number (27490775731).

Almost surely, 2^54981551461 is an apocalyptic number.

It is an amenable number.

54981551461 is a deficient number, since it is larger than the sum of its proper divisors (1).

54981551461 is an equidigital number, since it uses as much as digits as its factorization.

54981551461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864000, while the sum is 49.

The spelling of 54981551461 in words is "fifty-four billion, nine hundred eighty-one million, five hundred fifty-one thousand, four hundred sixty-one".