54455990657 has 2 divisors, whose sum is σ = 54455990658. Its totient is φ = 54455990656.

The previous prime is 54455990621. The next prime is 54455990689. The reversal of 54455990657 is 75609955445.

It is a happy number.

54455990657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54160460176 + 295530481 = 232724^2 + 17191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54455990657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54455990596 and 54455990605.

It is not a weakly prime, because it can be changed into another prime (54455990357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27227995328 + 27227995329.

It is an arithmetic number, because the mean of its divisors is an integer number (27227995329).

Almost surely, 2^54455990657 is an apocalyptic number.

It is an amenable number.

54455990657 is a deficient number, since it is larger than the sum of its proper divisors (1).

54455990657 is an equidigital number, since it uses as much as digits as its factorization.

54455990657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020000, while the sum is 59.

The spelling of 54455990657 in words is "fifty-four billion, four hundred fifty-five million, nine hundred ninety thousand, six hundred fifty-seven".