55905738619 has 2 divisors, whose sum is σ = 55905738620. Its totient is φ = 55905738618.

The previous prime is 55905738617. The next prime is 55905738631. The reversal of 55905738619 is 91683750955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55905738619 - 2¹ = 55905738617 is a prime.

It is a super-2 number, since 2×55905738619² (a number of 22 digits) contains 22 as substring.

Together with 55905738617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55905738617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27952869309 + 27952869310.

It is an arithmetic number, because the mean of its divisors is an integer number (27952869310).

Almost surely, 2^55905738619 is an apocalyptic number.

55905738619 is a deficient number, since it is larger than the sum of its proper divisors (1).

55905738619 is an equidigital number, since it uses as much as digits as its factorization.

55905738619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206000, while the sum is 58.

The spelling of 55905738619 in words is "fifty-five billion, nine hundred five million, seven hundred thirty-eight thousand, six hundred nineteen".