55445659 has 2 divisors, whose sum is σ = 55445660. Its totient is φ = 55445658.

The previous prime is 55445657. The next prime is 55445693. The reversal of 55445659 is 95654455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55445659 - 2¹ = 55445657 is a prime.

It is a super-2 number, since 2×55445659² = 6148442203888562, which contains 22 as substring.

Together with 55445657, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55445657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27722829 + 27722830.

It is an arithmetic number, because the mean of its divisors is an integer number (27722830).

Almost surely, 2^55445659 is an apocalyptic number.

55445659 is a deficient number, since it is larger than the sum of its proper divisors (1).

55445659 is an equidigital number, since it uses as much as digits as its factorization.

55445659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540000, while the sum is 43.

The square root of 55445659 is about 7446.1841905771. The cubic root of 55445659 is about 381.3196477971.

The spelling of 55445659 in words is "fifty-five million, four hundred forty-five thousand, six hundred fifty-nine".