55155004501 has 2 divisors, whose sum is σ = 55155004502. Its totient is φ = 55155004500.

The previous prime is 55155004447. The next prime is 55155004507. The reversal of 55155004501 is 10540055155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32489702001 + 22665302500 = 180249^2 + 150550^2 .

It is a cyclic number.

It is not a de Polignac number, because 55155004501 - 2²¹ = 55152907349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55155004507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27577502250 + 27577502251.

It is an arithmetic number, because the mean of its divisors is an integer number (27577502251).

Almost surely, 2^55155004501 is an apocalyptic number.

It is an amenable number.

55155004501 is a deficient number, since it is larger than the sum of its proper divisors (1).

55155004501 is an equidigital number, since it uses as much as digits as its factorization.

55155004501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12500, while the sum is 31.

Adding to 55155004501 its reverse (10540055155), we get a palindrome (65695059656).

The spelling of 55155004501 in words is "fifty-five billion, one hundred fifty-five million, four thousand, five hundred one".